Finding the Third Proportional to 80,865 and 170,109

Step by Step Solution

1. Step 1: Write the proportion equation
   80,865 : 170,109 = 170,109 : x
2. Step 2: Convert to fraction form
   80,865/170,109 = 170,109/x
3. Step 3: Cross multiply
   80,865x = 170,109 × 170,109
4. Step 4: Simplify right side
   80,865x = 28,937,071,881
5. Step 5: Solve for x
   x = 28,937,071,881/80,865
6. Step 6: Final answer
   x = 357,844.21