Finding the Fourth Proportional to 3,960.59, 5,465.55 and 2,168.13

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.59 : 5,465.55 = 2,168.13 : x
2. Step 2: Convert to fraction form
   3,960.59/5,465.55 = 2,168.13/x
3. Step 3: Cross multiply
   3,960.59x = 5,465.55 × 2,168.13
4. Step 4: Simplify right side
   3,960.59x = 11,850,022.92
5. Step 5: Solve for x
   x = 11,850,022.92/3,960.59
6. Step 6: Final answer
   x = 2,991.99