Finding the Fourth Proportional to 2,143.37, 3,215.51 and 682.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.37 : 3,215.51 = 682.49 : x
2. Step 2: Convert to fraction form
   2,143.37/3,215.51 = 682.49/x
3. Step 3: Cross multiply
   2,143.37x = 3,215.51 × 682.49
4. Step 4: Simplify right side
   2,143.37x = 2,194,533.93
5. Step 5: Solve for x
   x = 2,194,533.93/2,143.37
6. Step 6: Final answer
   x = 1,023.87