Finding the Fourth Proportional to 8,116.57, 12,175.31 and 3,960.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,116.57 : 12,175.31 = 3,960.12 : x
2. Step 2: Convert to fraction form
   8,116.57/12,175.31 = 3,960.12/x
3. Step 3: Cross multiply
   8,116.57x = 12,175.31 × 3,960.12
4. Step 4: Simplify right side
   8,116.57x = 48,215,688.64
5. Step 5: Solve for x
   x = 48,215,688.64/8,116.57
6. Step 6: Final answer
   x = 5,940.40