I'm stumped in reference to figuring the answer for the following question. If anyone can help I would be so thankful. The question is as follows:

A county fire department receives property tax revenue on a 55% (December), 40% (April), 5% (June) basis. The uncollectible portion is .05%. If the department received %5.1 million in December, the annual property tax revenues will be.

The book answer is $9,268,091 but I can't figure out how they got the answer. Please help.