Finding the Third Proportional to 81,308 and 173,912

Step by Step Solution

1. Step 1: Write the proportion equation
   81,308 : 173,912 = 173,912 : x
2. Step 2: Convert to fraction form
   81,308/173,912 = 173,912/x
3. Step 3: Cross multiply
   81,308x = 173,912 × 173,912
4. Step 4: Simplify right side
   81,308x = 30,245,383,744
5. Step 5: Solve for x
   x = 30,245,383,744/81,308
6. Step 6: Final answer
   x = 371,985.34