Finding the Third Proportional to 10,111 and 20,708

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111 : 20,708 = 20,708 : x
2. Step 2: Convert to fraction form
   10,111/20,708 = 20,708/x
3. Step 3: Cross multiply
   10,111x = 20,708 × 20,708
4. Step 4: Simplify right side
   10,111x = 428,821,264
5. Step 5: Solve for x
   x = 428,821,264/10,111
6. Step 6: Final answer
   x = 42,411.36