Finding the Fourth Proportional to 2,076.30, 3,115.27 and 843.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.30 : 3,115.27 = 843.80 : x
2. Step 2: Convert to fraction form
   2,076.30/3,115.27 = 843.80/x
3. Step 3: Cross multiply
   2,076.30x = 3,115.27 × 843.80
4. Step 4: Simplify right side
   2,076.30x = 2,628,675.78
5. Step 5: Solve for x
   x = 2,628,675.78/2,076.30
6. Step 6: Final answer
   x = 1,266.04