Finding the Fourth Proportional to 2,143.29, 3,215.49 and 682.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.29 : 3,215.49 = 682.46 : x
2. Step 2: Convert to fraction form
   2,143.29/3,215.49 = 682.46/x
3. Step 3: Cross multiply
   2,143.29x = 3,215.49 × 682.46
4. Step 4: Simplify right side
   2,143.29x = 2,194,427.23
5. Step 5: Solve for x
   x = 2,194,427.23/2,143.29
6. Step 6: Final answer
   x = 1,023.86