Finding the Fourth Proportional to 2,276.43, 3,413.42 and 814.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.43 : 3,413.42 = 814.78 : x
2. Step 2: Convert to fraction form
   2,276.43/3,413.42 = 814.78/x
3. Step 3: Cross multiply
   2,276.43x = 3,413.42 × 814.78
4. Step 4: Simplify right side
   2,276.43x = 2,781,186.35
5. Step 5: Solve for x
   x = 2,781,186.35/2,276.43
6. Step 6: Final answer
   x = 1,221.73