 Africa's richest man, Aliko Dangute, has been ranked 117 in the latest Bloomberg Billionaires Index. His net worth is calculated to be $17.8 billion or $7.8 trillion. The index is a daily ranking of the world's richest people and is usually updated at the close of every trading day in New York. It tells a boss, a Tesla boss, Elon Musk tops the index with the net worth of $194 billion, followed by Amazon founder Jeff Bezos also worth $194 billion.