Finding the Fourth Proportional to 2,819.57, 3,892.78 and 1,811.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.57 : 3,892.78 = 1,811.73 : x
2. Step 2: Convert to fraction form
   2,819.57/3,892.78 = 1,811.73/x
3. Step 3: Cross multiply
   2,819.57x = 3,892.78 × 1,811.73
4. Step 4: Simplify right side
   2,819.57x = 7,052,660.38
5. Step 5: Solve for x
   x = 7,052,660.38/2,819.57
6. Step 6: Final answer
   x = 2,501.32