Finding the Fourth Proportional to 2,812.42, 4,215.75 and 1,057.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,812.42 : 4,215.75 = 1,057.10 : x
2. Step 2: Convert to fraction form
   2,812.42/4,215.75 = 1,057.10/x
3. Step 3: Cross multiply
   2,812.42x = 4,215.75 × 1,057.10
4. Step 4: Simplify right side
   2,812.42x = 4,456,468.00
5. Step 5: Solve for x
   x = 4,456,468.00/2,812.42
6. Step 6: Final answer
   x = 1,584.57