Finding the Third Proportional to 4,908 and 10,420

Step by Step Solution

1. Step 1: Write the proportion equation
   4,908 : 10,420 = 10,420 : x
2. Step 2: Convert to fraction form
   4,908/10,420 = 10,420/x
3. Step 3: Cross multiply
   4,908x = 10,420 × 10,420
4. Step 4: Simplify right side
   4,908x = 108,576,400
5. Step 5: Solve for x
   x = 108,576,400/4,908
6. Step 6: Final answer
   x = 22,122.33