Finding the Fourth Proportional to 2,627.18, 3,940.83 and 679.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.18 : 3,940.83 = 679.38 : x
2. Step 2: Convert to fraction form
   2,627.18/3,940.83 = 679.38/x
3. Step 3: Cross multiply
   2,627.18x = 3,940.83 × 679.38
4. Step 4: Simplify right side
   2,627.18x = 2,677,321.09
5. Step 5: Solve for x
   x = 2,677,321.09/2,627.18
6. Step 6: Final answer
   x = 1,019.09