Finding the Fourth Proportional to 2,568.92, 3,857.16 and 2,101.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.92 : 3,857.16 = 2,101.80 : x
2. Step 2: Convert to fraction form
   2,568.92/3,857.16 = 2,101.80/x
3. Step 3: Cross multiply
   2,568.92x = 3,857.16 × 2,101.80
4. Step 4: Simplify right side
   2,568.92x = 8,106,978.89
5. Step 5: Solve for x
   x = 8,106,978.89/2,568.92
6. Step 6: Final answer
   x = 3,155.79