Finding the Third Proportional to 9,831 and 21,858

Step by Step Solution

1. Step 1: Write the proportion equation
   9,831 : 21,858 = 21,858 : x
2. Step 2: Convert to fraction form
   9,831/21,858 = 21,858/x
3. Step 3: Cross multiply
   9,831x = 21,858 × 21,858
4. Step 4: Simplify right side
   9,831x = 477,772,164
5. Step 5: Solve for x
   x = 477,772,164/9,831
6. Step 6: Final answer
   x = 48,598.53