Finding the Fourth Proportional to 12,788.62, 17,648.78 and 7,411.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.62 : 17,648.78 = 7,411.24 : x
2. Step 2: Convert to fraction form
   12,788.62/17,648.78 = 7,411.24/x
3. Step 3: Cross multiply
   12,788.62x = 17,648.78 × 7,411.24
4. Step 4: Simplify right side
   12,788.62x = 130,799,256.04
5. Step 5: Solve for x
   x = 130,799,256.04/12,788.62
6. Step 6: Final answer
   x = 10,227.79