Finding the Fourth Proportional to 1,042.17, 1,439.37 and 710.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.17 : 1,439.37 = 710.04 : x
2. Step 2: Convert to fraction form
   1,042.17/1,439.37 = 710.04/x
3. Step 3: Cross multiply
   1,042.17x = 1,439.37 × 710.04
4. Step 4: Simplify right side
   1,042.17x = 1,022,010.27
5. Step 5: Solve for x
   x = 1,022,010.27/1,042.17
6. Step 6: Final answer
   x = 980.66