Finding the Third Proportional to 21,418 and 34,109

Step by Step Solution

1. Step 1: Write the proportion equation
   21,418 : 34,109 = 34,109 : x
2. Step 2: Convert to fraction form
   21,418/34,109 = 34,109/x
3. Step 3: Cross multiply
   21,418x = 34,109 × 34,109
4. Step 4: Simplify right side
   21,418x = 1,163,423,881
5. Step 5: Solve for x
   x = 1,163,423,881/21,418
6. Step 6: Final answer
   x = 54,319.91