Finding the Third Proportional to 78,469 and 161,069

Step by Step Solution

1. Step 1: Write the proportion equation
   78,469 : 161,069 = 161,069 : x
2. Step 2: Convert to fraction form
   78,469/161,069 = 161,069/x
3. Step 3: Cross multiply
   78,469x = 161,069 × 161,069
4. Step 4: Simplify right side
   78,469x = 25,943,222,761
5. Step 5: Solve for x
   x = 25,943,222,761/78,469
6. Step 6: Final answer
   x = 330,617.48