Finding the Fourth Proportional to 2,542.59, 3,811.46 and 810.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.59 : 3,811.46 = 810.09 : x
2. Step 2: Convert to fraction form
   2,542.59/3,811.46 = 810.09/x
3. Step 3: Cross multiply
   2,542.59x = 3,811.46 × 810.09
4. Step 4: Simplify right side
   2,542.59x = 3,087,621.58
5. Step 5: Solve for x
   x = 3,087,621.58/2,542.59
6. Step 6: Final answer
   x = 1,214.36