Finding the Fourth Proportional to 3,947.14, 5,447.55 and 2,456.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.14 : 5,447.55 = 2,456.56 : x
2. Step 2: Convert to fraction form
   3,947.14/5,447.55 = 2,456.56/x
3. Step 3: Cross multiply
   3,947.14x = 5,447.55 × 2,456.56
4. Step 4: Simplify right side
   3,947.14x = 13,382,233.43
5. Step 5: Solve for x
   x = 13,382,233.43/3,947.14
6. Step 6: Final answer
   x = 3,390.36