Finding the Fourth Proportional to 3,145.43, 4,340.39 and 1,819.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,145.43 : 4,340.39 = 1,819.56 : x
2. Step 2: Convert to fraction form
   3,145.43/4,340.39 = 1,819.56/x
3. Step 3: Cross multiply
   3,145.43x = 4,340.39 × 1,819.56
4. Step 4: Simplify right side
   3,145.43x = 7,897,607.21
5. Step 5: Solve for x
   x = 7,897,607.21/3,145.43
6. Step 6: Final answer
   x = 2,510.82