Finding the Fourth Proportional to 1,470.40, 2,028.96 and 880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,470.40 : 2,028.96 = 880.72 : x
2. Step 2: Convert to fraction form
   1,470.40/2,028.96 = 880.72/x
3. Step 3: Cross multiply
   1,470.40x = 2,028.96 × 880.72
4. Step 4: Simplify right side
   1,470.40x = 1,786,945.65
5. Step 5: Solve for x
   x = 1,786,945.65/1,470.40
6. Step 6: Final answer
   x = 1,215.28