Finding the Fourth Proportional to 9,168.14, 12,651.86 and 5,391.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.14 : 12,651.86 = 5,391.72 : x
2. Step 2: Convert to fraction form
   9,168.14/12,651.86 = 5,391.72/x
3. Step 3: Cross multiply
   9,168.14x = 12,651.86 × 5,391.72
4. Step 4: Simplify right side
   9,168.14x = 68,215,286.60
5. Step 5: Solve for x
   x = 68,215,286.60/9,168.14
6. Step 6: Final answer
   x = 7,440.47