Finding the Fourth Proportional to 1,008.32, 1,391.50 and 560.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.32 : 1,391.50 = 560.23 : x
2. Step 2: Convert to fraction form
   1,008.32/1,391.50 = 560.23/x
3. Step 3: Cross multiply
   1,008.32x = 1,391.50 × 560.23
4. Step 4: Simplify right side
   1,008.32x = 779,556.86
5. Step 5: Solve for x
   x = 779,556.86/1,008.32
6. Step 6: Final answer
   x = 773.13