Finding the Fourth Proportional to 8,788.88, 13,132.90 and 8,624.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.88 : 13,132.90 = 8,624.72 : x
2. Step 2: Convert to fraction form
   8,788.88/13,132.90 = 8,624.72/x
3. Step 3: Cross multiply
   8,788.88x = 13,132.90 × 8,624.72
4. Step 4: Simplify right side
   8,788.88x = 113,267,585.29
5. Step 5: Solve for x
   x = 113,267,585.29/8,788.88
6. Step 6: Final answer
   x = 12,887.60