Finding the Fourth Proportional to 8,443.60, 12,665.48 and 5,540.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443.60 : 12,665.48 = 5,540.32 : x
2. Step 2: Convert to fraction form
   8,443.60/12,665.48 = 5,540.32/x
3. Step 3: Cross multiply
   8,443.60x = 12,665.48 × 5,540.32
4. Step 4: Simplify right side
   8,443.60x = 70,170,812.15
5. Step 5: Solve for x
   x = 70,170,812.15/8,443.60
6. Step 6: Final answer
   x = 8,310.53