Finding the Fourth Proportional to 3,947.82, 5,449.05 and 2,456.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.82 : 5,449.05 = 2,456.34 : x
2. Step 2: Convert to fraction form
   3,947.82/5,449.05 = 2,456.34/x
3. Step 3: Cross multiply
   3,947.82x = 5,449.05 × 2,456.34
4. Step 4: Simplify right side
   3,947.82x = 13,384,719.48
5. Step 5: Solve for x
   x = 13,384,719.48/3,947.82
6. Step 6: Final answer
   x = 3,390.41