Gautam Adani has overtaken Bill Gates to become the world's fourth richest person with a $114 billion fortune, said Forbes. Elon Musk is the world's richest with $230 billion wealth, followed by Bernard Arnault ($148 billion) and Jeff Bezos ($139 billion). Larry Ellison, Warren Buffett, and Larry Page rank 6th, 7th and 8th on the world's 10 richest people list.