Finding the Fourth Proportional to 3,952.16, 5,928.78 and 2,103.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,952.16 : 5,928.78 = 2,103.20 : x
2. Step 2: Convert to fraction form
   3,952.16/5,928.78 = 2,103.20/x
3. Step 3: Cross multiply
   3,952.16x = 5,928.78 × 2,103.20
4. Step 4: Simplify right side
   3,952.16x = 12,469,410.10
5. Step 5: Solve for x
   x = 12,469,410.10/3,952.16
6. Step 6: Final answer
   x = 3,155.09