Finding the Fourth Proportional to 3,922.72, 5,879.28 and 2,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,922.72 : 5,879.28 = 2,626.72 : x
2. Step 2: Convert to fraction form
   3,922.72/5,879.28 = 2,626.72/x
3. Step 3: Cross multiply
   3,922.72x = 5,879.28 × 2,626.72
4. Step 4: Simplify right side
   3,922.72x = 15,443,222.36
5. Step 5: Solve for x
   x = 15,443,222.36/3,922.72
6. Step 6: Final answer
   x = 3,936.87