Finding the Fourth Proportional to 1,470.64, 2,028.72 and 880.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,470.64 : 2,028.72 = 880.96 : x
2. Step 2: Convert to fraction form
   1,470.64/2,028.72 = 880.96/x
3. Step 3: Cross multiply
   1,470.64x = 2,028.72 × 880.96
4. Step 4: Simplify right side
   1,470.64x = 1,787,221.17
5. Step 5: Solve for x
   x = 1,787,221.17/1,470.64
6. Step 6: Final answer
   x = 1,215.27