Finding the Third Proportional to 9,790 and 21,821

Step by Step Solution

1. Step 1: Write the proportion equation
   9,790 : 21,821 = 21,821 : x
2. Step 2: Convert to fraction form
   9,790/21,821 = 21,821/x
3. Step 3: Cross multiply
   9,790x = 21,821 × 21,821
4. Step 4: Simplify right side
   9,790x = 476,156,041
5. Step 5: Solve for x
   x = 476,156,041/9,790
6. Step 6: Final answer
   x = 48,636.98