Finding the Fourth Proportional to 9,545.52, 13,142.88 and 8,670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,545.52 : 13,142.88 = 8,670.72 : x
2. Step 2: Convert to fraction form
   9,545.52/13,142.88 = 8,670.72/x
3. Step 3: Cross multiply
   9,545.52x = 13,142.88 × 8,670.72
4. Step 4: Simplify right side
   9,545.52x = 113,958,232.47
5. Step 5: Solve for x
   x = 113,958,232.47/9,545.52
6. Step 6: Final answer
   x = 11,938.40