Finding the Fourth Proportional to 2,452.72, 3,679.54 and 809.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.72 : 3,679.54 = 809.74 : x
2. Step 2: Convert to fraction form
   2,452.72/3,679.54 = 809.74/x
3. Step 3: Cross multiply
   2,452.72x = 3,679.54 × 809.74
4. Step 4: Simplify right side
   2,452.72x = 2,979,470.72
5. Step 5: Solve for x
   x = 2,979,470.72/2,452.72
6. Step 6: Final answer
   x = 1,214.76