With an estimated net worth of $18.6 billion, Michael Dell is one of the wealthiest people in the world.
Dell dropped out of school at the University of Texas at Austin to found Dell Computer Corp., which soon became one of the fastest growing companies in the country. He was only 23 when his company had its IPO in 1988, and soon, he was a billionaire. 
Dell lives the extravagant life of a successful businessman as well, complete with all of the private planes, summer homes, and sweet rides you'd expect from a billionaire.