Finding the Fourth Proportional to 2,057.28, 2,839.02 and 1,125.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.28 : 2,839.02 = 1,125.78 : x
2. Step 2: Convert to fraction form
   2,057.28/2,839.02 = 1,125.78/x
3. Step 3: Cross multiply
   2,057.28x = 2,839.02 × 1,125.78
4. Step 4: Simplify right side
   2,057.28x = 3,196,111.94
5. Step 5: Solve for x
   x = 3,196,111.94/2,057.28
6. Step 6: Final answer
   x = 1,553.56