Finding the Fourth Proportional to 8,899.46, 12,283.69 and 5,540.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,899.46 : 12,283.69 = 5,540.28 : x
2. Step 2: Convert to fraction form
   8,899.46/12,283.69 = 5,540.28/x
3. Step 3: Cross multiply
   8,899.46x = 12,283.69 × 5,540.28
4. Step 4: Simplify right side
   8,899.46x = 68,055,082.03
5. Step 5: Solve for x
   x = 68,055,082.03/8,899.46
6. Step 6: Final answer
   x = 7,647.10