Finding the Third Proportional to 72,192 and 173,918

Step by Step Solution

1. Step 1: Write the proportion equation
   72,192 : 173,918 = 173,918 : x
2. Step 2: Convert to fraction form
   72,192/173,918 = 173,918/x
3. Step 3: Cross multiply
   72,192x = 173,918 × 173,918
4. Step 4: Simplify right side
   72,192x = 30,247,470,724
5. Step 5: Solve for x
   x = 30,247,470,724/72,192
6. Step 6: Final answer
   x = 418,986.46