Finding the Fourth Proportional to 1,397.25, 1,929.02 and 932.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.25 : 1,929.02 = 932.31 : x
2. Step 2: Convert to fraction form
   1,397.25/1,929.02 = 932.31/x
3. Step 3: Cross multiply
   1,397.25x = 1,929.02 × 932.31
4. Step 4: Simplify right side
   1,397.25x = 1,798,439.97
5. Step 5: Solve for x
   x = 1,798,439.97/1,397.25
6. Step 6: Final answer
   x = 1,287.13