Finding the Fourth Proportional to 1,088.46, 1,501.72 and 616.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.46 : 1,501.72 = 616.31 : x
2. Step 2: Convert to fraction form
   1,088.46/1,501.72 = 616.31/x
3. Step 3: Cross multiply
   1,088.46x = 1,501.72 × 616.31
4. Step 4: Simplify right side
   1,088.46x = 925,527.27
5. Step 5: Solve for x
   x = 925,527.27/1,088.46
6. Step 6: Final answer
   x = 850.31