Finding the Fourth Proportional to 12,363.50, 18,498.72 and 8,672.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,363.50 : 18,498.72 = 8,672.96 : x
2. Step 2: Convert to fraction form
   12,363.50/18,498.72 = 8,672.96/x
3. Step 3: Cross multiply
   12,363.50x = 18,498.72 × 8,672.96
4. Step 4: Simplify right side
   12,363.50x = 160,438,658.61
5. Step 5: Solve for x
   x = 160,438,658.61/12,363.50
6. Step 6: Final answer
   x = 12,976.80