Finding the Fourth Proportional to 2,627.30, 3,940.90 and 679.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.30 : 3,940.90 = 679.46 : x
2. Step 2: Convert to fraction form
   2,627.30/3,940.90 = 679.46/x
3. Step 3: Cross multiply
   2,627.30x = 3,940.90 × 679.46
4. Step 4: Simplify right side
   2,627.30x = 2,677,683.91
5. Step 5: Solve for x
   x = 2,677,683.91/2,627.30
6. Step 6: Final answer
   x = 1,019.18