Finding the Fourth Proportional to 2,042.43, 3,061.62 and 809.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.43 : 3,061.62 = 809.07 : x
2. Step 2: Convert to fraction form
   2,042.43/3,061.62 = 809.07/x
3. Step 3: Cross multiply
   2,042.43x = 3,061.62 × 809.07
4. Step 4: Simplify right side
   2,042.43x = 2,477,064.89
5. Step 5: Solve for x
   x = 2,477,064.89/2,042.43
6. Step 6: Final answer
   x = 1,212.80