Finding the Fourth Proportional to 2,819.81, 4,229.82 and 871.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.81 : 4,229.82 = 871.97 : x
2. Step 2: Convert to fraction form
   2,819.81/4,229.82 = 871.97/x
3. Step 3: Cross multiply
   2,819.81x = 4,229.82 × 871.97
4. Step 4: Simplify right side
   2,819.81x = 3,688,255.00
5. Step 5: Solve for x
   x = 3,688,255.00/2,819.81
6. Step 6: Final answer
   x = 1,307.98