Finding the Fourth Proportional to 9,661.07, 13,302.43 and 7,545.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,661.07 : 13,302.43 = 7,545.15 : x
2. Step 2: Convert to fraction form
   9,661.07/13,302.43 = 7,545.15/x
3. Step 3: Cross multiply
   9,661.07x = 13,302.43 × 7,545.15
4. Step 4: Simplify right side
   9,661.07x = 100,368,810.85
5. Step 5: Solve for x
   x = 100,368,810.85/9,661.07
6. Step 6: Final answer
   x = 10,388.99