Finding the Fourth Proportional to 1,008.34, 1,391.46 and 560.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.34 : 1,391.46 = 560.18 : x
2. Step 2: Convert to fraction form
   1,008.34/1,391.46 = 560.18/x
3. Step 3: Cross multiply
   1,008.34x = 1,391.46 × 560.18
4. Step 4: Simplify right side
   1,008.34x = 779,468.06
5. Step 5: Solve for x
   x = 779,468.06/1,008.34
6. Step 6: Final answer
   x = 773.02