Finding the Fourth Proportional to 2,143.72, 3,213.96 and 682.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.72 : 3,213.96 = 682.03 : x
2. Step 2: Convert to fraction form
   2,143.72/3,213.96 = 682.03/x
3. Step 3: Cross multiply
   2,143.72x = 3,213.96 × 682.03
4. Step 4: Simplify right side
   2,143.72x = 2,192,017.14
5. Step 5: Solve for x
   x = 2,192,017.14/2,143.72
6. Step 6: Final answer
   x = 1,022.53