Finding the Third Proportional to 9,812 and 21,189

Step by Step Solution

1. Step 1: Write the proportion equation
   9,812 : 21,189 = 21,189 : x
2. Step 2: Convert to fraction form
   9,812/21,189 = 21,189/x
3. Step 3: Cross multiply
   9,812x = 21,189 × 21,189
4. Step 4: Simplify right side
   9,812x = 448,973,721
5. Step 5: Solve for x
   x = 448,973,721/9,812
6. Step 6: Final answer
   x = 45,757.62