Finding the Fourth Proportional to 2,143.86, 3,216.15 and 683.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.86 : 3,216.15 = 683.46 : x
2. Step 2: Convert to fraction form
   2,143.86/3,216.15 = 683.46/x
3. Step 3: Cross multiply
   2,143.86x = 3,216.15 × 683.46
4. Step 4: Simplify right side
   2,143.86x = 2,198,109.88
5. Step 5: Solve for x
   x = 2,198,109.88/2,143.86
6. Step 6: Final answer
   x = 1,025.30