Finding the Fourth Proportional to 2,819.22, 4,227.96 and 871.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.22 : 4,227.96 = 871.38 : x
2. Step 2: Convert to fraction form
   2,819.22/4,227.96 = 871.38/x
3. Step 3: Cross multiply
   2,819.22x = 4,227.96 × 871.38
4. Step 4: Simplify right side
   2,819.22x = 3,684,159.78
5. Step 5: Solve for x
   x = 3,684,159.78/2,819.22
6. Step 6: Final answer
   x = 1,306.80