Finding the Fourth Proportional to 9,015.85, 12,441.69 and 5,480.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,015.85 : 12,441.69 = 5,480.20 : x
2. Step 2: Convert to fraction form
   9,015.85/12,441.69 = 5,480.20/x
3. Step 3: Cross multiply
   9,015.85x = 12,441.69 × 5,480.20
4. Step 4: Simplify right side
   9,015.85x = 68,182,922.39
5. Step 5: Solve for x
   x = 68,182,922.39/9,015.85
6. Step 6: Final answer
   x = 7,562.56