Finding the Fourth Proportional to 2,819.69, 3,891.57 and 1,641.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.69 : 3,891.57 = 1,641.14 : x
2. Step 2: Convert to fraction form
   2,819.69/3,891.57 = 1,641.14/x
3. Step 3: Cross multiply
   2,819.69x = 3,891.57 × 1,641.14
4. Step 4: Simplify right side
   2,819.69x = 6,386,591.73
5. Step 5: Solve for x
   x = 6,386,591.73/2,819.69
6. Step 6: Final answer
   x = 2,265.00