Finding the Fourth Proportional to 3,976.79, 5,488.21 and 2,208.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.79 : 5,488.21 = 2,208.42 : x
2. Step 2: Convert to fraction form
   3,976.79/5,488.21 = 2,208.42/x
3. Step 3: Cross multiply
   3,976.79x = 5,488.21 × 2,208.42
4. Step 4: Simplify right side
   3,976.79x = 12,120,272.73
5. Step 5: Solve for x
   x = 12,120,272.73/3,976.79
6. Step 6: Final answer
   x = 3,047.76