Finding the Fourth Proportional to 14,356.40, 21,505.20 and 8,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,356.40 : 21,505.20 = 8,498.72 : x
2. Step 2: Convert to fraction form
   14,356.40/21,505.20 = 8,498.72/x
3. Step 3: Cross multiply
   14,356.40x = 21,505.20 × 8,498.72
4. Step 4: Simplify right side
   14,356.40x = 182,766,673.34
5. Step 5: Solve for x
   x = 182,766,673.34/14,356.40
6. Step 6: Final answer
   x = 12,730.68