Finding the Fourth Proportional to 1,013.31, 1,397.86 and 748.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.31 : 1,397.86 = 748.24 : x
2. Step 2: Convert to fraction form
   1,013.31/1,397.86 = 748.24/x
3. Step 3: Cross multiply
   1,013.31x = 1,397.86 × 748.24
4. Step 4: Simplify right side
   1,013.31x = 1,045,929.40
5. Step 5: Solve for x
   x = 1,045,929.40/1,013.31
6. Step 6: Final answer
   x = 1,032.19