Finding the Fourth Proportional to 1,443.50, 2,163.21 and 712.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.50 : 2,163.21 = 712.06 : x
2. Step 2: Convert to fraction form
   1,443.50/2,163.21 = 712.06/x
3. Step 3: Cross multiply
   1,443.50x = 2,163.21 × 712.06
4. Step 4: Simplify right side
   1,443.50x = 1,540,335.31
5. Step 5: Solve for x
   x = 1,540,335.31/1,443.50
6. Step 6: Final answer
   x = 1,067.08