Finding the Third Proportional to 10,411 and 21,208

Step by Step Solution

1. Step 1: Write the proportion equation
   10,411 : 21,208 = 21,208 : x
2. Step 2: Convert to fraction form
   10,411/21,208 = 21,208/x
3. Step 3: Cross multiply
   10,411x = 21,208 × 21,208
4. Step 4: Simplify right side
   10,411x = 449,779,264
5. Step 5: Solve for x
   x = 449,779,264/10,411
6. Step 6: Final answer
   x = 43,202.31