Finding the Fourth Proportional to 13,373.71, 18,459.72 and 8,658.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,373.71 : 18,459.72 = 8,658.31 : x
2. Step 2: Convert to fraction form
   13,373.71/18,459.72 = 8,658.31/x
3. Step 3: Cross multiply
   13,373.71x = 18,459.72 × 8,658.31
4. Step 4: Simplify right side
   13,373.71x = 159,829,978.27
5. Step 5: Solve for x
   x = 159,829,978.27/13,373.71
6. Step 6: Final answer
   x = 11,951.06