Finding the Third Proportional to 21,215 and 41,894

Step by Step Solution

1. Step 1: Write the proportion equation
   21,215 : 41,894 = 41,894 : x
2. Step 2: Convert to fraction form
   21,215/41,894 = 41,894/x
3. Step 3: Cross multiply
   21,215x = 41,894 × 41,894
4. Step 4: Simplify right side
   21,215x = 1,755,107,236
5. Step 5: Solve for x
   x = 1,755,107,236/21,215
6. Step 6: Final answer
   x = 82,729.54