Finding the Fourth Proportional to 2,819.62, 4,229.88 and 871.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.62 : 4,229.88 = 871.82 : x
2. Step 2: Convert to fraction form
   2,819.62/4,229.88 = 871.82/x
3. Step 3: Cross multiply
   2,819.62x = 4,229.88 × 871.82
4. Step 4: Simplify right side
   2,819.62x = 3,687,693.98
5. Step 5: Solve for x
   x = 3,687,693.98/2,819.62
6. Step 6: Final answer
   x = 1,307.87