Finding the Fourth Proportional to 2,787.26, 4,182.50 and 1,057.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.26 : 4,182.50 = 1,057.10 : x
2. Step 2: Convert to fraction form
   2,787.26/4,182.50 = 1,057.10/x
3. Step 3: Cross multiply
   2,787.26x = 4,182.50 × 1,057.10
4. Step 4: Simplify right side
   2,787.26x = 4,421,294.55
5. Step 5: Solve for x
   x = 4,421,294.55/2,787.26
6. Step 6: Final answer
   x = 1,586.25