Finding the Fourth Proportional to 2,057.62, 3,086.70 and 1,083.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.62 : 3,086.70 = 1,083.78 : x
2. Step 2: Convert to fraction form
   2,057.62/3,086.70 = 1,083.78/x
3. Step 3: Cross multiply
   2,057.62x = 3,086.70 × 1,083.78
4. Step 4: Simplify right side
   2,057.62x = 3,345,303.73
5. Step 5: Solve for x
   x = 3,345,303.73/2,057.62
6. Step 6: Final answer
   x = 1,625.81