Finding the Fourth Proportional to 2,630.72, 3,942.84 and 2,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.72 : 3,942.84 = 2,144.72 : x
2. Step 2: Convert to fraction form
   2,630.72/3,942.84 = 2,144.72/x
3. Step 3: Cross multiply
   2,630.72x = 3,942.84 × 2,144.72
4. Step 4: Simplify right side
   2,630.72x = 8,456,287.80
5. Step 5: Solve for x
   x = 8,456,287.80/2,630.72
6. Step 6: Final answer
   x = 3,214.44