Finding the Fourth Proportional to 2,119.62, 3,172.83 and 1,143.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.62 : 3,172.83 = 1,143.30 : x
2. Step 2: Convert to fraction form
   2,119.62/3,172.83 = 1,143.30/x
3. Step 3: Cross multiply
   2,119.62x = 3,172.83 × 1,143.30
4. Step 4: Simplify right side
   2,119.62x = 3,627,496.54
5. Step 5: Solve for x
   x = 3,627,496.54/2,119.62
6. Step 6: Final answer
   x = 1,711.39