Finding the Fourth Proportional to 2,517.89, 3,776.36 and 1,057.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.89 : 3,776.36 = 1,057.05 : x
2. Step 2: Convert to fraction form
   2,517.89/3,776.36 = 1,057.05/x
3. Step 3: Cross multiply
   2,517.89x = 3,776.36 × 1,057.05
4. Step 4: Simplify right side
   2,517.89x = 3,991,809.46
5. Step 5: Solve for x
   x = 3,991,809.46/2,517.89
6. Step 6: Final answer
   x = 1,585.38