Finding the Fourth Proportional to 1,008.32, 1,391.33 and 566.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.32 : 1,391.33 = 566.15 : x
2. Step 2: Convert to fraction form
   1,008.32/1,391.33 = 566.15/x
3. Step 3: Cross multiply
   1,008.32x = 1,391.33 × 566.15
4. Step 4: Simplify right side
   1,008.32x = 787,691.69
5. Step 5: Solve for x
   x = 787,691.69/1,008.32
6. Step 6: Final answer
   x = 781.20