Please answer the following question: Facts:   - death place: manhattan , new york , u.s.    - residence: park cinq , manhattan , new york    - known for: ludwig institute for cancer research , jari project    - death cause: heart failure    - death date: 27 august 1992    - spouse: 1 -rrb- 2 -rrb- gertrude virginia higgins -lrb- 1897 -- 1993 -rrb- -rrb- gladys madeline jones -lrb- 1904 -- 1978    - parents: daniel flora belle ludwig -lrb- 1875 -- 1961 -rrb- f. ludwig -lrb- 1873 -- 1960 -rrb- &      - children: patricia margaret    - birth date: 24 june 1897    - name: daniel keith ludwig    - image: daniel k. ludwig.jpg    - birth place: south haven , michigan , u.s.    - boards: ludwig , american-hawaiian steamship company , princess international hotels , exportadora institute de sal , sa , citricos de chiriqui , sa for , united pocahontas coal company , european-american securities inc. , cancer southwest savings and loan association , research , national bulk carriers    - occupation: global business magnate   Based on these bullet points, write a short biography describing the life of daniel k. ludwig .
Answer:
daniel keith ludwig -lrb- june 24 , 1897 -- august 27 , 1992 -rrb- was a united states shipping magnate , businessman with numerous companies , and billionaire .he pioneered the construction of super tankers in japan , founded exportadora de sal , sa in mexico and developed it as the largest salt company in the world , built a model community in association with his huge jari project on the amazon river in brazil to produce pulp paper , and had numerous hotels around the world .even though he was one of the wealthiest men of his day , with operations spanning 23 countries , his name was little known .throughout his business life , he maintained a low profile ; he ceased speaking to the press in the 1950s .ludwig has the distinction of being # 1 on the first forbes 400 `` richest americans '' list published in 1982 .