Finding the Fourth Proportional to 2,517.78, 3,776.94 and 1,057.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.78 : 3,776.94 = 1,057.62 : x
2. Step 2: Convert to fraction form
   2,517.78/3,776.94 = 1,057.62/x
3. Step 3: Cross multiply
   2,517.78x = 3,776.94 × 1,057.62
4. Step 4: Simplify right side
   2,517.78x = 3,994,567.28
5. Step 5: Solve for x
   x = 3,994,567.28/2,517.78
6. Step 6: Final answer
   x = 1,586.54