Finding the Fourth Proportional to 1,025.17, 1,415.18 and 710.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.17 : 1,415.18 = 710.37 : x
2. Step 2: Convert to fraction form
   1,025.17/1,415.18 = 710.37/x
3. Step 3: Cross multiply
   1,025.17x = 1,415.18 × 710.37
4. Step 4: Simplify right side
   1,025.17x = 1,005,301.42
5. Step 5: Solve for x
   x = 1,005,301.42/1,025.17
6. Step 6: Final answer
   x = 980.62