Finding the Fourth Proportional to 2,627.31, 3,940.89 and 679.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.31 : 3,940.89 = 679.44 : x
2. Step 2: Convert to fraction form
   2,627.31/3,940.89 = 679.44/x
3. Step 3: Cross multiply
   2,627.31x = 3,940.89 × 679.44
4. Step 4: Simplify right side
   2,627.31x = 2,677,598.30
5. Step 5: Solve for x
   x = 2,677,598.30/2,627.31
6. Step 6: Final answer
   x = 1,019.14