Finding the Fourth Proportional to 2,456.82, 3,683.04 and 812.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.82 : 3,683.04 = 812.88 : x
2. Step 2: Convert to fraction form
   2,456.82/3,683.04 = 812.88/x
3. Step 3: Cross multiply
   2,456.82x = 3,683.04 × 812.88
4. Step 4: Simplify right side
   2,456.82x = 2,993,869.56
5. Step 5: Solve for x
   x = 2,993,869.56/2,456.82
6. Step 6: Final answer
   x = 1,218.60