Finding the Fourth Proportional to 1,480.35, 2,042.89 and 817.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.35 : 2,042.89 = 817.20 : x
2. Step 2: Convert to fraction form
   1,480.35/2,042.89 = 817.20/x
3. Step 3: Cross multiply
   1,480.35x = 2,042.89 × 817.20
4. Step 4: Simplify right side
   1,480.35x = 1,669,449.71
5. Step 5: Solve for x
   x = 1,669,449.71/1,480.35
6. Step 6: Final answer
   x = 1,127.74