Finding the Fourth Proportional to 2,145.07, 3,217.91 and 683.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.07 : 3,217.91 = 683.73 : x
2. Step 2: Convert to fraction form
   2,145.07/3,217.91 = 683.73/x
3. Step 3: Cross multiply
   2,145.07x = 3,217.91 × 683.73
4. Step 4: Simplify right side
   2,145.07x = 2,200,181.60
5. Step 5: Solve for x
   x = 2,200,181.60/2,145.07
6. Step 6: Final answer
   x = 1,025.69