Finding the Fourth Proportional to 3,821.27, 5,273.60 and 2,142.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,821.27 : 5,273.60 = 2,142.78 : x
2. Step 2: Convert to fraction form
   3,821.27/5,273.60 = 2,142.78/x
3. Step 3: Cross multiply
   3,821.27x = 5,273.60 × 2,142.78
4. Step 4: Simplify right side
   3,821.27x = 11,300,164.61
5. Step 5: Solve for x
   x = 11,300,164.61/3,821.27
6. Step 6: Final answer
   x = 2,957.18