Finding the Third Proportional to 9,620 and 18,520

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620 : 18,520 = 18,520 : x
2. Step 2: Convert to fraction form
   9,620/18,520 = 18,520/x
3. Step 3: Cross multiply
   9,620x = 18,520 × 18,520
4. Step 4: Simplify right side
   9,620x = 342,990,400
5. Step 5: Solve for x
   x = 342,990,400/9,620
6. Step 6: Final answer
   x = 35,653.89