Finding the Fourth Proportional to 1,443.62, 2,163.90 and 712.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.62 : 2,163.90 = 712.28 : x
2. Step 2: Convert to fraction form
   1,443.62/2,163.90 = 712.28/x
3. Step 3: Cross multiply
   1,443.62x = 2,163.90 × 712.28
4. Step 4: Simplify right side
   1,443.62x = 1,541,302.69
5. Step 5: Solve for x
   x = 1,541,302.69/1,443.62
6. Step 6: Final answer
   x = 1,067.67