Finding the Fourth Proportional to 1,340.28, 1,843.56 and 1,143.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.28 : 1,843.56 = 1,143.45 : x
2. Step 2: Convert to fraction form
   1,340.28/1,843.56 = 1,143.45/x
3. Step 3: Cross multiply
   1,340.28x = 1,843.56 × 1,143.45
4. Step 4: Simplify right side
   1,340.28x = 2,108,018.68
5. Step 5: Solve for x
   x = 2,108,018.68/1,340.28
6. Step 6: Final answer
   x = 1,572.82