Finding the Fourth Proportional to 2,042.30, 3,062.55 and 809.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.30 : 3,062.55 = 809.30 : x
2. Step 2: Convert to fraction form
   2,042.30/3,062.55 = 809.30/x
3. Step 3: Cross multiply
   2,042.30x = 3,062.55 × 809.30
4. Step 4: Simplify right side
   2,042.30x = 2,478,521.72
5. Step 5: Solve for x
   x = 2,478,521.72/2,042.30
6. Step 6: Final answer
   x = 1,213.59