Finding the Third Proportional to 9,620 and 20,812

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620 : 20,812 = 20,812 : x
2. Step 2: Convert to fraction form
   9,620/20,812 = 20,812/x
3. Step 3: Cross multiply
   9,620x = 20,812 × 20,812
4. Step 4: Simplify right side
   9,620x = 433,139,344
5. Step 5: Solve for x
   x = 433,139,344/9,620
6. Step 6: Final answer
   x = 45,024.88