Finding the Fourth Proportional to 1,685.52, 2,325.77 and 939.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.52 : 2,325.77 = 939.50 : x
2. Step 2: Convert to fraction form
   1,685.52/2,325.77 = 939.50/x
3. Step 3: Cross multiply
   1,685.52x = 2,325.77 × 939.50
4. Step 4: Simplify right side
   1,685.52x = 2,185,044.59
5. Step 5: Solve for x
   x = 2,185,044.59/1,685.52
6. Step 6: Final answer
   x = 1,296.36