Finding the Fourth Proportional to 9,013.92, 12,440.88 and 5,480.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,013.92 : 12,440.88 = 5,480.16 : x
2. Step 2: Convert to fraction form
   9,013.92/12,440.88 = 5,480.16/x
3. Step 3: Cross multiply
   9,013.92x = 12,440.88 × 5,480.16
4. Step 4: Simplify right side
   9,013.92x = 68,178,012.94
5. Step 5: Solve for x
   x = 68,178,012.94/9,013.92
6. Step 6: Final answer
   x = 7,563.64