Finding the Fourth Proportional to 10,828, 16,242 and 2,620

Step by Step Solution

1. Step 1: Write the proportion equation
   10,828 : 16,242 = 2,620 : x
2. Step 2: Convert to fraction form
   10,828/16,242 = 2,620/x
3. Step 3: Cross multiply
   10,828x = 16,242 × 2,620
4. Step 4: Simplify right side
   10,828x = 42,554,040
5. Step 5: Solve for x
   x = 42,554,040/10,828
6. Step 6: Final answer
   x = 3,930