Finding the Fourth Proportional to 23,400.28, 32,292.30 and 12,789.91

Step by Step Solution

1. Step 1: Write the proportion equation
   23,400.28 : 32,292.30 = 12,789.91 : x
2. Step 2: Convert to fraction form
   23,400.28/32,292.30 = 12,789.91/x
3. Step 3: Cross multiply
   23,400.28x = 32,292.30 × 12,789.91
4. Step 4: Simplify right side
   23,400.28x = 413,015,610.69
5. Step 5: Solve for x
   x = 413,015,610.69/23,400.28
6. Step 6: Final answer
   x = 17,650.03