Finding the Third Proportional to 16,005 and 21,411

Step by Step Solution

1. Step 1: Write the proportion equation
   16,005 : 21,411 = 21,411 : x
2. Step 2: Convert to fraction form
   16,005/21,411 = 21,411/x
3. Step 3: Cross multiply
   16,005x = 21,411 × 21,411
4. Step 4: Simplify right side
   16,005x = 458,430,921
5. Step 5: Solve for x
   x = 458,430,921/16,005
6. Step 6: Final answer
   x = 28,642.98