Finding the Fourth Proportional to 9,552.78, 13,196.13 and 9,085.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,552.78 : 13,196.13 = 9,085.69 : x
2. Step 2: Convert to fraction form
   9,552.78/13,196.13 = 9,085.69/x
3. Step 3: Cross multiply
   9,552.78x = 13,196.13 × 9,085.69
4. Step 4: Simplify right side
   9,552.78x = 119,895,928.80
5. Step 5: Solve for x
   x = 119,895,928.80/9,552.78
6. Step 6: Final answer
   x = 12,550.89