Finding the Fourth Proportional to 1,443.46, 1,989.21 and 1,028.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.46 : 1,989.21 = 1,028.74 : x
2. Step 2: Convert to fraction form
   1,443.46/1,989.21 = 1,028.74/x
3. Step 3: Cross multiply
   1,443.46x = 1,989.21 × 1,028.74
4. Step 4: Simplify right side
   1,443.46x = 2,046,379.90
5. Step 5: Solve for x
   x = 2,046,379.90/1,443.46
6. Step 6: Final answer
   x = 1,417.69