Finding the Third Proportional to 9,817.50 and 21,021

Step by Step Solution

1. Step 1: Write the proportion equation
   9,817.50 : 21,021 = 21,021 : x
2. Step 2: Convert to fraction form
   9,817.50/21,021 = 21,021/x
3. Step 3: Cross multiply
   9,817.50x = 21,021 × 21,021
4. Step 4: Simplify right side
   9,817.50x = 441,882,441
5. Step 5: Solve for x
   x = 441,882,441/9,817.50
6. Step 6: Final answer
   x = 45,009.67