Finding the Third Proportional to 9,861 and 13,851

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861 : 13,851 = 13,851 : x
2. Step 2: Convert to fraction form
   9,861/13,851 = 13,851/x
3. Step 3: Cross multiply
   9,861x = 13,851 × 13,851
4. Step 4: Simplify right side
   9,861x = 191,850,201
5. Step 5: Solve for x
   x = 191,850,201/9,861
6. Step 6: Final answer
   x = 19,455.45