Finding the Fourth Proportional to 2,803.89, 3,866.90 and 2,057.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,803.89 : 3,866.90 = 2,057.75 : x
2. Step 2: Convert to fraction form
   2,803.89/3,866.90 = 2,057.75/x
3. Step 3: Cross multiply
   2,803.89x = 3,866.90 × 2,057.75
4. Step 4: Simplify right side
   2,803.89x = 7,957,083.85
5. Step 5: Solve for x
   x = 7,957,083.85/2,803.89
6. Step 6: Final answer
   x = 2,837.87