Finding the Fourth Proportional to 2,818.05, 4,227.18 and 843.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,818.05 : 4,227.18 = 843.71 : x
2. Step 2: Convert to fraction form
   2,818.05/4,227.18 = 843.71/x
3. Step 3: Cross multiply
   2,818.05x = 4,227.18 × 843.71
4. Step 4: Simplify right side
   2,818.05x = 3,566,514.04
5. Step 5: Solve for x
   x = 3,566,514.04/2,818.05
6. Step 6: Final answer
   x = 1,265.60