Finding the Fourth Proportional to 2,541.42, 3,812.85 and 810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,541.42 : 3,812.85 = 810.18 : x
2. Step 2: Convert to fraction form
   2,541.42/3,812.85 = 810.18/x
3. Step 3: Cross multiply
   2,541.42x = 3,812.85 × 810.18
4. Step 4: Simplify right side
   2,541.42x = 3,089,094.81
5. Step 5: Solve for x
   x = 3,089,094.81/2,541.42
6. Step 6: Final answer
   x = 1,215.50