Finding the Fourth Proportional to 2,042.72, 3,062.56 and 809.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.72 : 3,062.56 = 809.12 : x
2. Step 2: Convert to fraction form
   2,042.72/3,062.56 = 809.12/x
3. Step 3: Cross multiply
   2,042.72x = 3,062.56 × 809.12
4. Step 4: Simplify right side
   2,042.72x = 2,477,978.55
5. Step 5: Solve for x
   x = 2,477,978.55/2,042.72
6. Step 6: Final answer
   x = 1,213.08