Finding the Third Proportional to 4,918 and 10,286

Step by Step Solution

1. Step 1: Write the proportion equation
   4,918 : 10,286 = 10,286 : x
2. Step 2: Convert to fraction form
   4,918/10,286 = 10,286/x
3. Step 3: Cross multiply
   4,918x = 10,286 × 10,286
4. Step 4: Simplify right side
   4,918x = 105,801,796
5. Step 5: Solve for x
   x = 105,801,796/4,918
6. Step 6: Final answer
   x = 21,513.18