Finding the Fourth Proportional to 2,567.43, 3,851.42 and 812.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.43 : 3,851.42 = 812.48 : x
2. Step 2: Convert to fraction form
   2,567.43/3,851.42 = 812.48/x
3. Step 3: Cross multiply
   2,567.43x = 3,851.42 × 812.48
4. Step 4: Simplify right side
   2,567.43x = 3,129,201.72
5. Step 5: Solve for x
   x = 3,129,201.72/2,567.43
6. Step 6: Final answer
   x = 1,218.81