Finding the Fourth Proportional to 1,443.11, 2,165.33 and 712.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.11 : 2,165.33 = 712.28 : x
2. Step 2: Convert to fraction form
   1,443.11/2,165.33 = 712.28/x
3. Step 3: Cross multiply
   1,443.11x = 2,165.33 × 712.28
4. Step 4: Simplify right side
   1,443.11x = 1,542,328.45
5. Step 5: Solve for x
   x = 1,542,328.45/1,443.11
6. Step 6: Final answer
   x = 1,068.76