Finding the Fourth Proportional to 23,399, 32,290.56 and 12,788.71

Step by Step Solution

1. Step 1: Write the proportion equation
   23,399 : 32,290.56 = 12,788.71 : x
2. Step 2: Convert to fraction form
   23,399/32,290.56 = 12,788.71/x
3. Step 3: Cross multiply
   23,399x = 32,290.56 × 12,788.71
4. Step 4: Simplify right side
   23,399x = 412,954,607.58
5. Step 5: Solve for x
   x = 412,954,607.58/23,399
6. Step 6: Final answer
   x = 17,648.39