Finding the Third Proportional to 12,647.25 and 20,972.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,647.25 : 20,972.25 = 20,972.25 : x
2. Step 2: Convert to fraction form
   12,647.25/20,972.25 = 20,972.25/x
3. Step 3: Cross multiply
   12,647.25x = 20,972.25 × 20,972.25
4. Step 4: Simplify right side
   12,647.25x = 439,835,270.06
5. Step 5: Solve for x
   x = 439,835,270.06/12,647.25
6. Step 6: Final answer
   x = 34,777.15