Finding the Third Proportional to 26,109 and 42,039

Step by Step Solution

1. Step 1: Write the proportion equation
   26,109 : 42,039 = 42,039 : x
2. Step 2: Convert to fraction form
   26,109/42,039 = 42,039/x
3. Step 3: Cross multiply
   26,109x = 42,039 × 42,039
4. Step 4: Simplify right side
   26,109x = 1,767,277,521
5. Step 5: Solve for x
   x = 1,767,277,521/26,109
6. Step 6: Final answer
   x = 67,688.44