Finding the Fourth Proportional to 12,788.43, 17,648.84 and 8,536.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.43 : 17,648.84 = 8,536.79 : x
2. Step 2: Convert to fraction form
   12,788.43/17,648.84 = 8,536.79/x
3. Step 3: Cross multiply
   12,788.43x = 17,648.84 × 8,536.79
4. Step 4: Simplify right side
   12,788.43x = 150,664,458.27
5. Step 5: Solve for x
   x = 150,664,458.27/12,788.43
6. Step 6: Final answer
   x = 11,781.31