Finding the Fourth Proportional to 2,540.58, 3,811.59 and 809.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.58 : 3,811.59 = 809.34 : x
2. Step 2: Convert to fraction form
   2,540.58/3,811.59 = 809.34/x
3. Step 3: Cross multiply
   2,540.58x = 3,811.59 × 809.34
4. Step 4: Simplify right side
   2,540.58x = 3,084,872.25
5. Step 5: Solve for x
   x = 3,084,872.25/2,540.58
6. Step 6: Final answer
   x = 1,214.24