Finding the Fourth Proportional to 2,145.42, 3,216.06 and 683.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.42 : 3,216.06 = 683.62 : x
2. Step 2: Convert to fraction form
   2,145.42/3,216.06 = 683.62/x
3. Step 3: Cross multiply
   2,145.42x = 3,216.06 × 683.62
4. Step 4: Simplify right side
   2,145.42x = 2,198,562.94
5. Step 5: Solve for x
   x = 2,198,562.94/2,145.42
6. Step 6: Final answer
   x = 1,024.77