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how do you solve this word problem using a proportion?

Steve recently received a raise of 6% of his salary at his part-time job. He now earns $38.69 per week. How much did he earn per week before his raise?

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PIYUSH L. | Maths tutoring for middle school to college maths studentsMaths tutoring for middle school to coll...
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Suppose he used to make $ X before the raise. After getting 6% raise he makes $ 1.06*X now which is equal to $38.69.
Therefore using proportions, 
X / 1.06 X = ? / 38.69
? = 38.69 * X \ 1.06*X= 38.69 / 1.06 = $ 36.5


My math book says in the back of it that the answer is $36.50, but that is not the answer you have. Is there any other way to solve this math problem?
The book answer is correct. I had an error in my calculation. I did it with 60% increase rather than 6%. I have modified my calculations above. Please have a look.