Finding the Fourth Proportional to 9,174.72, 12,661.20 and 5,448

Step by Step Solution

1. Step 1: Write the proportion equation
   9,174.72 : 12,661.20 = 5,448 : x
2. Step 2: Convert to fraction form
   9,174.72/12,661.20 = 5,448/x
3. Step 3: Cross multiply
   9,174.72x = 12,661.20 × 5,448
4. Step 4: Simplify right side
   9,174.72x = 68,978,217.60
5. Step 5: Solve for x
   x = 68,978,217.60/9,174.72
6. Step 6: Final answer
   x = 7,518.29