Finding the Third Proportional to 9,860 and 21,106

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860 : 21,106 = 21,106 : x
2. Step 2: Convert to fraction form
   9,860/21,106 = 21,106/x
3. Step 3: Cross multiply
   9,860x = 21,106 × 21,106
4. Step 4: Simplify right side
   9,860x = 445,463,236
5. Step 5: Solve for x
   x = 445,463,236/9,860
6. Step 6: Final answer
   x = 45,178.83