The 19-year-old has previously been strongly linked with a move to Dutch giants Ajax.
David underwent a medical in West London on Friday.
Dutch side Twente have confirmed that the youngster has now joined Fulham.
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.