Finding the Fourth Proportional to 3,105.75, 4,285.94 and 2,057.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.75 : 4,285.94 = 2,057.82 : x
2. Step 2: Convert to fraction form
   3,105.75/4,285.94 = 2,057.82/x
3. Step 3: Cross multiply
   3,105.75x = 4,285.94 × 2,057.82
4. Step 4: Simplify right side
   3,105.75x = 8,819,682.76
5. Step 5: Solve for x
   x = 8,819,682.76/3,105.75
6. Step 6: Final answer
   x = 2,839.79