Finding the Fourth Proportional to 8,788.71, 12,128.10 and 5,249.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.71 : 12,128.10 = 5,249.82 : x
2. Step 2: Convert to fraction form
   8,788.71/12,128.10 = 5,249.82/x
3. Step 3: Cross multiply
   8,788.71x = 12,128.10 × 5,249.82
4. Step 4: Simplify right side
   8,788.71x = 63,670,341.94
5. Step 5: Solve for x
   x = 63,670,341.94/8,788.71
6. Step 6: Final answer
   x = 7,244.56