Finding the Fourth Proportional to 1,023.02, 1,411.35 and 712.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,023.02 : 1,411.35 = 712.70 : x
2. Step 2: Convert to fraction form
   1,023.02/1,411.35 = 712.70/x
3. Step 3: Cross multiply
   1,023.02x = 1,411.35 × 712.70
4. Step 4: Simplify right side
   1,023.02x = 1,005,869.15
5. Step 5: Solve for x
   x = 1,005,869.15/1,023.02
6. Step 6: Final answer
   x = 983.24