Finding the Fourth Proportional to 8,778.24, 12,108.96 and 7,732.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,778.24 : 12,108.96 = 7,732.80 : x
2. Step 2: Convert to fraction form
   8,778.24/12,108.96 = 7,732.80/x
3. Step 3: Cross multiply
   8,778.24x = 12,108.96 × 7,732.80
4. Step 4: Simplify right side
   8,778.24x = 93,636,165.89
5. Step 5: Solve for x
   x = 93,636,165.89/8,778.24
6. Step 6: Final answer
   x = 10,666.85