Finding the Fourth Proportional to 12,354.52, 18,541.50 and 7,429.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,354.52 : 18,541.50 = 7,429.72 : x
2. Step 2: Convert to fraction form
   12,354.52/18,541.50 = 7,429.72/x
3. Step 3: Cross multiply
   12,354.52x = 18,541.50 × 7,429.72
4. Step 4: Simplify right side
   12,354.52x = 137,758,153.38
5. Step 5: Solve for x
   x = 137,758,153.38/12,354.52
6. Step 6: Final answer
   x = 11,150.43