Finding the Fourth Proportional to 3,105.56, 4,285.69 and 2,057.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.56 : 4,285.69 = 2,057.63 : x
2. Step 2: Convert to fraction form
   3,105.56/4,285.69 = 2,057.63/x
3. Step 3: Cross multiply
   3,105.56x = 4,285.69 × 2,057.63
4. Step 4: Simplify right side
   3,105.56x = 8,818,337.74
5. Step 5: Solve for x
   x = 8,818,337.74/3,105.56
6. Step 6: Final answer
   x = 2,839.53