Answer:  2.26 units
Explanation:  Since this is a right triangle, we can use trigonometry.
The trig ratios are SohCahToa.  Using 37 as a reference angle, we see that TY is the opposite side and RT is the adjacent.
Thus, we have tan 37=x/3, which then becomes 3*tan 37.
The answer is then 2.26.