Finding the Third Proportional to 13,809 and 21,417

Step by Step Solution

1. Step 1: Write the proportion equation
   13,809 : 21,417 = 21,417 : x
2. Step 2: Convert to fraction form
   13,809/21,417 = 21,417/x
3. Step 3: Cross multiply
   13,809x = 21,417 × 21,417
4. Step 4: Simplify right side
   13,809x = 458,687,889
5. Step 5: Solve for x
   x = 458,687,889/13,809
6. Step 6: Final answer
   x = 33,216.59