Finding the Third Proportional to 10,008 and 21,861

Step by Step Solution

1. Step 1: Write the proportion equation
   10,008 : 21,861 = 21,861 : x
2. Step 2: Convert to fraction form
   10,008/21,861 = 21,861/x
3. Step 3: Cross multiply
   10,008x = 21,861 × 21,861
4. Step 4: Simplify right side
   10,008x = 477,903,321
5. Step 5: Solve for x
   x = 477,903,321/10,008
6. Step 6: Final answer
   x = 47,752.13