Finding the Fourth Proportional to 3,948.55, 5,448.78 and 2,456.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.55 : 5,448.78 = 2,456.42 : x
2. Step 2: Convert to fraction form
   3,948.55/5,448.78 = 2,456.42/x
3. Step 3: Cross multiply
   3,948.55x = 5,448.78 × 2,456.42
4. Step 4: Simplify right side
   3,948.55x = 13,384,492.17
5. Step 5: Solve for x
   x = 13,384,492.17/3,948.55
6. Step 6: Final answer
   x = 3,389.72