I am having trouble with a mastering physics problem. I am told

A spelunker is surveying a cave. She follows a passage 130m straight west, then 290m in a direction 45

east of south, and then 280m at 30

east of north. After a fourth unmeasured displacement, she finds herself back where she started.Use a scale drawing to determine the magnitude of the fourth displacement.

I tried breaking each vector down into components and doing the math but I did not get the right answer. I also tried using a scale drawing also but I could not get it that way. I am asking for help because I only have two more attempts at the problem before I get no credit for it. If anyone can help me out I would greatly appriciate it.