Forbes has released its list of the biggest billionaires of the world. After five years, business tycoon, chief of Reliance Industries, Mukesh Ambani has made it into this critical list. Forbes tracked the net worths of more than 2,000 billionaires in 2017. The 10 biggest billionaire gainers added a total of $204 billion to their fortunes, compared to a mere $74.7 billion gain in 2016, as per the Forbes analysis. This is an annual ranking based on the documented net worth of the world's wealthiest billionaires by the American business magazine Forbes.