Finding the Fourth Proportional to 23,399.40, 32,291.16 and 12,789.06

Step by Step Solution

1. Step 1: Write the proportion equation
   23,399.40 : 32,291.16 = 12,789.06 : x
2. Step 2: Convert to fraction form
   23,399.40/32,291.16 = 12,789.06/x
3. Step 3: Cross multiply
   23,399.40x = 32,291.16 × 12,789.06
4. Step 4: Simplify right side
   23,399.40x = 412,973,582.71
5. Step 5: Solve for x
   x = 412,973,582.71/23,399.40
6. Step 6: Final answer
   x = 17,648.90