Finding the Fourth Proportional to 3,854.31, 5,781.39 and 932.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,854.31 : 5,781.39 = 932.58 : x
2. Step 2: Convert to fraction form
   3,854.31/5,781.39 = 932.58/x
3. Step 3: Cross multiply
   3,854.31x = 5,781.39 × 932.58
4. Step 4: Simplify right side
   3,854.31x = 5,391,608.69
5. Step 5: Solve for x
   x = 5,391,608.69/3,854.31
6. Step 6: Final answer
   x = 1,398.85