Finding the Third Proportional to 70,170 and 155,109

Step by Step Solution

1. Step 1: Write the proportion equation
   70,170 : 155,109 = 155,109 : x
2. Step 2: Convert to fraction form
   70,170/155,109 = 155,109/x
3. Step 3: Cross multiply
   70,170x = 155,109 × 155,109
4. Step 4: Simplify right side
   70,170x = 24,058,801,881
5. Step 5: Solve for x
   x = 24,058,801,881/70,170
6. Step 6: Final answer
   x = 342,864.50