Finding the Fourth Proportional to 1,121.31, 1,546.38 and 748.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121.31 : 1,546.38 = 748.71 : x
2. Step 2: Convert to fraction form
   1,121.31/1,546.38 = 748.71/x
3. Step 3: Cross multiply
   1,121.31x = 1,546.38 × 748.71
4. Step 4: Simplify right side
   1,121.31x = 1,157,790.17
5. Step 5: Solve for x
   x = 1,157,790.17/1,121.31
6. Step 6: Final answer
   x = 1,032.53