Finding the Fourth Proportional to 23,399.50, 32,291.25 and 12,789.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,399.50 : 32,291.25 = 12,789.21 : x
2. Step 2: Convert to fraction form
   23,399.50/32,291.25 = 12,789.21/x
3. Step 3: Cross multiply
   23,399.50x = 32,291.25 × 12,789.21
4. Step 4: Simplify right side
   23,399.50x = 412,979,577.41
5. Step 5: Solve for x
   x = 412,979,577.41/23,399.50
6. Step 6: Final answer
   x = 17,649.08