Finding the Fourth Proportional to 3,948.79, 5,449.34 and 2,180.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.79 : 5,449.34 = 2,180.52 : x
2. Step 2: Convert to fraction form
   3,948.79/5,449.34 = 2,180.52/x
3. Step 3: Cross multiply
   3,948.79x = 5,449.34 × 2,180.52
4. Step 4: Simplify right side
   3,948.79x = 11,882,394.86
5. Step 5: Solve for x
   x = 11,882,394.86/3,948.79
6. Step 6: Final answer
   x = 3,009.12