Finding the Third Proportional to 12,648 and 30,636

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648 : 30,636 = 30,636 : x
2. Step 2: Convert to fraction form
   12,648/30,636 = 30,636/x
3. Step 3: Cross multiply
   12,648x = 30,636 × 30,636
4. Step 4: Simplify right side
   12,648x = 938,564,496
5. Step 5: Solve for x
   x = 938,564,496/12,648
6. Step 6: Final answer
   x = 74,206.55