Finding the Fourth Proportional to 8,140.24, 12,203.16 and 3,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,140.24 : 12,203.16 = 3,520.72 : x
2. Step 2: Convert to fraction form
   8,140.24/12,203.16 = 3,520.72/x
3. Step 3: Cross multiply
   8,140.24x = 12,203.16 × 3,520.72
4. Step 4: Simplify right side
   8,140.24x = 42,963,909.48
5. Step 5: Solve for x
   x = 42,963,909.48/8,140.24
6. Step 6: Final answer
   x = 5,277.97