Finding the Third Proportional to 15,329 and 21,109

Step by Step Solution

1. Step 1: Write the proportion equation
   15,329 : 21,109 = 21,109 : x
2. Step 2: Convert to fraction form
   15,329/21,109 = 21,109/x
3. Step 3: Cross multiply
   15,329x = 21,109 × 21,109
4. Step 4: Simplify right side
   15,329x = 445,589,881
5. Step 5: Solve for x
   x = 445,589,881/15,329
6. Step 6: Final answer
   x = 29,068.42