Finding the Fourth Proportional to 2,144.91, 3,215.31 and 683.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.91 : 3,215.31 = 683.12 : x
2. Step 2: Convert to fraction form
   2,144.91/3,215.31 = 683.12/x
3. Step 3: Cross multiply
   2,144.91x = 3,215.31 × 683.12
4. Step 4: Simplify right side
   2,144.91x = 2,196,426.49
5. Step 5: Solve for x
   x = 2,196,426.49/2,144.91
6. Step 6: Final answer
   x = 1,024.02