Finding the Fourth Proportional to 1,371.24, 2,057.46 and 721.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.24 : 2,057.46 = 721.82 : x
2. Step 2: Convert to fraction form
   1,371.24/2,057.46 = 721.82/x
3. Step 3: Cross multiply
   1,371.24x = 2,057.46 × 721.82
4. Step 4: Simplify right side
   1,371.24x = 1,485,115.78
5. Step 5: Solve for x
   x = 1,485,115.78/1,371.24
6. Step 6: Final answer
   x = 1,083.05