Finding the Fourth Proportional to 1,912.20, 2,861.82 and 1,143.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.20 : 2,861.82 = 1,143.24 : x
2. Step 2: Convert to fraction form
   1,912.20/2,861.82 = 1,143.24/x
3. Step 3: Cross multiply
   1,912.20x = 2,861.82 × 1,143.24
4. Step 4: Simplify right side
   1,912.20x = 3,271,747.10
5. Step 5: Solve for x
   x = 3,271,747.10/1,912.20
6. Step 6: Final answer
   x = 1,710.99