Finding the Fourth Proportional to 1,008.83, 1,392.17 and 560.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.83 : 1,392.17 = 560.72 : x
2. Step 2: Convert to fraction form
   1,008.83/1,392.17 = 560.72/x
3. Step 3: Cross multiply
   1,008.83x = 1,392.17 × 560.72
4. Step 4: Simplify right side
   1,008.83x = 780,610.60
5. Step 5: Solve for x
   x = 780,610.60/1,008.83
6. Step 6: Final answer
   x = 773.78