Finding the Fourth Proportional to 1,480.24, 2,042.72 and 890.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.24 : 2,042.72 = 890.65 : x
2. Step 2: Convert to fraction form
   1,480.24/2,042.72 = 890.65/x
3. Step 3: Cross multiply
   1,480.24x = 2,042.72 × 890.65
4. Step 4: Simplify right side
   1,480.24x = 1,819,342.35
5. Step 5: Solve for x
   x = 1,819,342.35/1,480.24
6. Step 6: Final answer
   x = 1,229.09