Finding the Third Proportional to 9,894 and 21,243

Step by Step Solution

1. Step 1: Write the proportion equation
   9,894 : 21,243 = 21,243 : x
2. Step 2: Convert to fraction form
   9,894/21,243 = 21,243/x
3. Step 3: Cross multiply
   9,894x = 21,243 × 21,243
4. Step 4: Simplify right side
   9,894x = 451,265,049
5. Step 5: Solve for x
   x = 451,265,049/9,894
6. Step 6: Final answer
   x = 45,609.97