LOL. No one estimated that. Trump bragged it. Sorry, but under oath in a deposition, Trump said he exagerates about his wealth, and he bases his net worth on, "how he fees." His own words. Deutschebank, his own bank, estimated his worth at $788 million. But the most researched book on his worth said was $150 to %250 million. Trump sued those people and lost.
But that information doesn't include creditors and leveraged. Who knows. Plus, he needs to get bailed out every so often.
He has five legitimate kids, and three ex wives. Who knows who else his money is supposed to go to.
Don’t worry: even if Ivanka’s an illegal Czech alien, under President Hillary she’ll still be entitled to free Obamacare ;-)