Finding the Third Proportional to 21,512 and 30,636

Step by Step Solution

1. Step 1: Write the proportion equation
   21,512 : 30,636 = 30,636 : x
2. Step 2: Convert to fraction form
   21,512/30,636 = 30,636/x
3. Step 3: Cross multiply
   21,512x = 30,636 × 30,636
4. Step 4: Simplify right side
   21,512x = 938,564,496
5. Step 5: Solve for x
   x = 938,564,496/21,512
6. Step 6: Final answer
   x = 43,629.81