Finding the Fourth Proportional to 9,169.12, 12,645.04 and 7,755.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,169.12 : 12,645.04 = 7,755.76 : x
2. Step 2: Convert to fraction form
   9,169.12/12,645.04 = 7,755.76/x
3. Step 3: Cross multiply
   9,169.12x = 12,645.04 × 7,755.76
4. Step 4: Simplify right side
   9,169.12x = 98,071,895.43
5. Step 5: Solve for x
   x = 98,071,895.43/9,169.12
6. Step 6: Final answer
   x = 10,695.89