Ajit Solanki/AP Mark Zuckerberg, Bill Gates, and Sundar Pichai are among the many US business leaders and celebrities invited to a pre-wedding party in India . Ambani, who owns a 42% stake in Reliance Industries, ranks 11th on the Bloomberg Billionaires Index with a $111 billion fortune . The centibillionaire's grip on domestic commerce makes him a powerful partner for Western companies trying to break into the Indian market