With a net worth of approximately $89 billion, Microsoft co-founder Bill Gates is one of the wealthiest men in the world. If he spent $1 million a day, it'd take him 245 years to spend his fortune. Here's how he made all that cash.
In 1975, Gates co-founded Microsoft. At 31, he became the world's youngest billionaire at the time. In 1995, he released Windows 95 and became the world's richest man. He's been at the top of the list ever since. Gates is also a leading philanthropist.