Finding the Fourth Proportional to 8,440.24, 12,647.34 and 3,505.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,440.24 : 12,647.34 = 3,505.72 : x
2. Step 2: Convert to fraction form
   8,440.24/12,647.34 = 3,505.72/x
3. Step 3: Cross multiply
   8,440.24x = 12,647.34 × 3,505.72
4. Step 4: Simplify right side
   8,440.24x = 44,338,032.78
5. Step 5: Solve for x
   x = 44,338,032.78/8,440.24
6. Step 6: Final answer
   x = 5,253.17