Finding the Fourth Proportional to 1,480.34, 2,042.89 and 817.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.34 : 2,042.89 = 817.21 : x
2. Step 2: Convert to fraction form
   1,480.34/2,042.89 = 817.21/x
3. Step 3: Cross multiply
   1,480.34x = 2,042.89 × 817.21
4. Step 4: Simplify right side
   1,480.34x = 1,669,470.14
5. Step 5: Solve for x
   x = 1,669,470.14/1,480.34
6. Step 6: Final answer
   x = 1,127.76