Finding the Third Proportional to 21,268 and 31,286

Step by Step Solution

1. Step 1: Write the proportion equation
   21,268 : 31,286 = 31,286 : x
2. Step 2: Convert to fraction form
   21,268/31,286 = 31,286/x
3. Step 3: Cross multiply
   21,268x = 31,286 × 31,286
4. Step 4: Simplify right side
   21,268x = 978,813,796
5. Step 5: Solve for x
   x = 978,813,796/21,268
6. Step 6: Final answer
   x = 46,022.84