Finding the Fourth Proportional to 1,086.31, 1,498.55 and 713.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.31 : 1,498.55 = 713.24 : x
2. Step 2: Convert to fraction form
   1,086.31/1,498.55 = 713.24/x
3. Step 3: Cross multiply
   1,086.31x = 1,498.55 × 713.24
4. Step 4: Simplify right side
   1,086.31x = 1,068,818.31
5. Step 5: Solve for x
   x = 1,068,818.31/1,086.31
6. Step 6: Final answer
   x = 983.90