Finding the Fourth Proportional to 23,398.79, 32,290.38 and 12,788.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,398.79 : 32,290.38 = 12,788.40 : x
2. Step 2: Convert to fraction form
   23,398.79/32,290.38 = 12,788.40/x
3. Step 3: Cross multiply
   23,398.79x = 32,290.38 × 12,788.40
4. Step 4: Simplify right side
   23,398.79x = 412,942,295.59
5. Step 5: Solve for x
   x = 412,942,295.59/23,398.79
6. Step 6: Final answer
   x = 17,648.02