Finding the Third Proportional to 21,518 and 30,249

Step by Step Solution

1. Step 1: Write the proportion equation
   21,518 : 30,249 = 30,249 : x
2. Step 2: Convert to fraction form
   21,518/30,249 = 30,249/x
3. Step 3: Cross multiply
   21,518x = 30,249 × 30,249
4. Step 4: Simplify right side
   21,518x = 915,002,001
5. Step 5: Solve for x
   x = 915,002,001/21,518
6. Step 6: Final answer
   x = 42,522.63