Finding the Fourth Proportional to 9,149.54, 12,635.33 and 7,815.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,149.54 : 12,635.33 = 7,815.47 : x
2. Step 2: Convert to fraction form
   9,149.54/12,635.33 = 7,815.47/x
3. Step 3: Cross multiply
   9,149.54x = 12,635.33 × 7,815.47
4. Step 4: Simplify right side
   9,149.54x = 98,750,940.30
5. Step 5: Solve for x
   x = 98,750,940.30/9,149.54
6. Step 6: Final answer
   x = 10,793.00