Finding the Third Proportional to 172.69 and 380.25

Step by Step Solution

1. Step 1: Write the proportion equation
   172.69 : 380.25 = 380.25 : x
2. Step 2: Convert to fraction form
   172.69/380.25 = 380.25/x
3. Step 3: Cross multiply
   172.69x = 380.25 × 380.25
4. Step 4: Simplify right side
   172.69x = 144,590.06
5. Step 5: Solve for x
   x = 144,590.06/172.69
6. Step 6: Final answer
   x = 837.29