Finding the Fourth Proportional to 3,976.77, 5,488.43 and 2,208.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.77 : 5,488.43 = 2,208.57 : x
2. Step 2: Convert to fraction form
   3,976.77/5,488.43 = 2,208.57/x
3. Step 3: Cross multiply
   3,976.77x = 5,488.43 × 2,208.57
4. Step 4: Simplify right side
   3,976.77x = 12,121,570.80
5. Step 5: Solve for x
   x = 12,121,570.80/3,976.77
6. Step 6: Final answer
   x = 3,048.09