Finding the Fourth Proportional to 9,108.18, 12,542.82 and 7,912.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.18 : 12,542.82 = 7,912.62 : x
2. Step 2: Convert to fraction form
   9,108.18/12,542.82 = 7,912.62/x
3. Step 3: Cross multiply
   9,108.18x = 12,542.82 × 7,912.62
4. Step 4: Simplify right side
   9,108.18x = 99,246,568.39
5. Step 5: Solve for x
   x = 99,246,568.39/9,108.18
6. Step 6: Final answer
   x = 10,896.42