Finding the Fourth Proportional to 9,168.54, 12,651.88 and 5,391.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.54 : 12,651.88 = 5,391.86 : x
2. Step 2: Convert to fraction form
   9,168.54/12,651.88 = 5,391.86/x
3. Step 3: Cross multiply
   9,168.54x = 12,651.88 × 5,391.86
4. Step 4: Simplify right side
   9,168.54x = 68,217,165.70
5. Step 5: Solve for x
   x = 68,217,165.70/9,168.54
6. Step 6: Final answer
   x = 7,440.35