Finding the Fourth Proportional to 14,838.72, 20,478.72 and 8,553.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,838.72 : 20,478.72 = 8,553.12 : x
2. Step 2: Convert to fraction form
   14,838.72/20,478.72 = 8,553.12/x
3. Step 3: Cross multiply
   14,838.72x = 20,478.72 × 8,553.12
4. Step 4: Simplify right side
   14,838.72x = 175,156,949.61
5. Step 5: Solve for x
   x = 175,156,949.61/14,838.72
6. Step 6: Final answer
   x = 11,804.05