Finding the Third Proportional to 12,936 and 20,715

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936 : 20,715 = 20,715 : x
2. Step 2: Convert to fraction form
   12,936/20,715 = 20,715/x
3. Step 3: Cross multiply
   12,936x = 20,715 × 20,715
4. Step 4: Simplify right side
   12,936x = 429,111,225
5. Step 5: Solve for x
   x = 429,111,225/12,936
6. Step 6: Final answer
   x = 33,171.86