Finding the Fourth Proportional to 23,499.38, 32,429.10 and 12,889.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,499.38 : 32,429.10 = 12,889.20 : x
2. Step 2: Convert to fraction form
   23,499.38/32,429.10 = 12,889.20/x
3. Step 3: Cross multiply
   23,499.38x = 32,429.10 × 12,889.20
4. Step 4: Simplify right side
   23,499.38x = 417,985,155.72
5. Step 5: Solve for x
   x = 417,985,155.72/23,499.38
6. Step 6: Final answer
   x = 17,787.07