Finding the Fourth Proportional to 1,441.28, 2,160.06 and 1,028.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.28 : 2,160.06 = 1,028.12 : x
2. Step 2: Convert to fraction form
   1,441.28/2,160.06 = 1,028.12/x
3. Step 3: Cross multiply
   1,441.28x = 2,160.06 × 1,028.12
4. Step 4: Simplify right side
   1,441.28x = 2,220,800.89
5. Step 5: Solve for x
   x = 2,220,800.89/1,441.28
6. Step 6: Final answer
   x = 1,540.85