Finding the Fourth Proportional to 3,947.15, 5,443.92 and 2,454.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.15 : 5,443.92 = 2,454.18 : x
2. Step 2: Convert to fraction form
   3,947.15/5,443.92 = 2,454.18/x
3. Step 3: Cross multiply
   3,947.15x = 5,443.92 × 2,454.18
4. Step 4: Simplify right side
   3,947.15x = 13,360,359.59
5. Step 5: Solve for x
   x = 13,360,359.59/3,947.15
6. Step 6: Final answer
   x = 3,384.81