Finding the Fourth Proportional to 2,541.72, 3,811.94 and 810.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,541.72 : 3,811.94 = 810.36 : x
2. Step 2: Convert to fraction form
   2,541.72/3,811.94 = 810.36/x
3. Step 3: Cross multiply
   2,541.72x = 3,811.94 × 810.36
4. Step 4: Simplify right side
   2,541.72x = 3,089,043.70
5. Step 5: Solve for x
   x = 3,089,043.70/2,541.72
6. Step 6: Final answer
   x = 1,215.34