Finding the Fourth Proportional to 1,141.31, 1,714.70 and 731.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.31 : 1,714.70 = 731.25 : x
2. Step 2: Convert to fraction form
   1,141.31/1,714.70 = 731.25/x
3. Step 3: Cross multiply
   1,141.31x = 1,714.70 × 731.25
4. Step 4: Simplify right side
   1,141.31x = 1,253,872.25
5. Step 5: Solve for x
   x = 1,253,872.25/1,141.31
6. Step 6: Final answer
   x = 1,098.62