Finding the Fourth Proportional to 2,144.10, 3,216.38 and 682.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.10 : 3,216.38 = 682.91 : x
2. Step 2: Convert to fraction form
   2,144.10/3,216.38 = 682.91/x
3. Step 3: Cross multiply
   2,144.10x = 3,216.38 × 682.91
4. Step 4: Simplify right side
   2,144.10x = 2,196,509.40
5. Step 5: Solve for x
   x = 2,196,509.40/2,144.10
6. Step 6: Final answer
   x = 1,024.45