Finding the Fourth Proportional to 2,143.32, 3,215.60 and 682.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.32 : 3,215.60 = 682.56 : x
2. Step 2: Convert to fraction form
   2,143.32/3,215.60 = 682.56/x
3. Step 3: Cross multiply
   2,143.32x = 3,215.60 × 682.56
4. Step 4: Simplify right side
   2,143.32x = 2,194,839.94
5. Step 5: Solve for x
   x = 2,194,839.94/2,143.32
6. Step 6: Final answer
   x = 1,024.04