Finding the Third Proportional to 9,620 and 19,960

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620 : 19,960 = 19,960 : x
2. Step 2: Convert to fraction form
   9,620/19,960 = 19,960/x
3. Step 3: Cross multiply
   9,620x = 19,960 × 19,960
4. Step 4: Simplify right side
   9,620x = 398,401,600
5. Step 5: Solve for x
   x = 398,401,600/9,620
6. Step 6: Final answer
   x = 41,413.89