Finding the Fourth Proportional to 2,456.43, 3,684.79 and 812.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.43 : 3,684.79 = 812.53 : x
2. Step 2: Convert to fraction form
   2,456.43/3,684.79 = 812.53/x
3. Step 3: Cross multiply
   2,456.43x = 3,684.79 × 812.53
4. Step 4: Simplify right side
   2,456.43x = 2,994,008.04
5. Step 5: Solve for x
   x = 2,994,008.04/2,456.43
6. Step 6: Final answer
   x = 1,218.85