Finding the Fourth Proportional to 2,671.88, 3,976.09 and 2,568.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.88 : 3,976.09 = 2,568.20 : x
2. Step 2: Convert to fraction form
   2,671.88/3,976.09 = 2,568.20/x
3. Step 3: Cross multiply
   2,671.88x = 3,976.09 × 2,568.20
4. Step 4: Simplify right side
   2,671.88x = 10,211,394.34
5. Step 5: Solve for x
   x = 10,211,394.34/2,671.88
6. Step 6: Final answer
   x = 3,821.80