Finding the Fourth Proportional to 10,778.72, 16,146.68 and 8,304.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,778.72 : 16,146.68 = 8,304.96 : x
2. Step 2: Convert to fraction form
   10,778.72/16,146.68 = 8,304.96/x
3. Step 3: Cross multiply
   10,778.72x = 16,146.68 × 8,304.96
4. Step 4: Simplify right side
   10,778.72x = 134,097,531.53
5. Step 5: Solve for x
   x = 134,097,531.53/10,778.72
6. Step 6: Final answer
   x = 12,440.95