Finding the Third Proportional to 9,800 and 21,800

Step by Step Solution

1. Step 1: Write the proportion equation
   9,800 : 21,800 = 21,800 : x
2. Step 2: Convert to fraction form
   9,800/21,800 = 21,800/x
3. Step 3: Cross multiply
   9,800x = 21,800 × 21,800
4. Step 4: Simplify right side
   9,800x = 475,240,000
5. Step 5: Solve for x
   x = 475,240,000/9,800
6. Step 6: Final answer
   x = 48,493.88