Trigonometry Prob: James (standing at D) kicks a ball towards Bob (standing at P).

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I have been stuck on this problem(which my teacher gave me) for days now, any response would be appreciated:

Here is a picture of the question, which gives the various measurements (keep in mind that the measurements might be a bit off as my class physically measured every length and angle)

The problem reads:

[FONT=&quot]James (who is standing at D) kicks a ball towards Bob who is standing at P. [/FONT]
[FONT=&quot]Bob needs to kick the ball at 17 degrees from P to a point on line G(in a straight line)(e.g. top of the goal). How far horizontally from G must he aim?(e.g. how far away from G is the point?).
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I know that the answer is between 4.8-5.2, but I just need to know how you would to that answer.

This picture shows the progress I have made so far:
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I used trig on the triangle and found various side lengths, but I just don't know where to go from here

Any answer would be appreciated(please show full working)

Thank you!

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