Finding the Fourth Proportional to 7,078.77, 10,609.95 and 3,960.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.77 : 10,609.95 = 3,960.18 : x
2. Step 2: Convert to fraction form
   7,078.77/10,609.95 = 3,960.18/x
3. Step 3: Cross multiply
   7,078.77x = 10,609.95 × 3,960.18
4. Step 4: Simplify right side
   7,078.77x = 42,017,311.79
5. Step 5: Solve for x
   x = 42,017,311.79/7,078.77
6. Step 6: Final answer
   x = 5,935.68