Finding the Fourth Proportional to 9,391.38, 12,957.17 and 5,411.95

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.38 : 12,957.17 = 5,411.95 : x
2. Step 2: Convert to fraction form
   9,391.38/12,957.17 = 5,411.95/x
3. Step 3: Cross multiply
   9,391.38x = 12,957.17 × 5,411.95
4. Step 4: Simplify right side
   9,391.38x = 70,123,496.73
5. Step 5: Solve for x
   x = 70,123,496.73/9,391.38
6. Step 6: Final answer
   x = 7,466.80