Finding the Fourth Proportional to 1,088.38, 1,501.86 and 616.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.38 : 1,501.86 = 616.15 : x
2. Step 2: Convert to fraction form
   1,088.38/1,501.86 = 616.15/x
3. Step 3: Cross multiply
   1,088.38x = 1,501.86 × 616.15
4. Step 4: Simplify right side
   1,088.38x = 925,367.28
5. Step 5: Solve for x
   x = 925,367.28/1,088.38
6. Step 6: Final answer
   x = 850.23