Finding the Fourth Proportional to 2,647.27, 3,970.83 and 699.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.27 : 3,970.83 = 699.49 : x
2. Step 2: Convert to fraction form
   2,647.27/3,970.83 = 699.49/x
3. Step 3: Cross multiply
   2,647.27x = 3,970.83 × 699.49
4. Step 4: Simplify right side
   2,647.27x = 2,777,545.95
5. Step 5: Solve for x
   x = 2,777,545.95/2,647.27
6. Step 6: Final answer
   x = 1,049.21