Finding the Third Proportional to 108,718 and 172,960

Step by Step Solution

1. Step 1: Write the proportion equation
   108,718 : 172,960 = 172,960 : x
2. Step 2: Convert to fraction form
   108,718/172,960 = 172,960/x
3. Step 3: Cross multiply
   108,718x = 172,960 × 172,960
4. Step 4: Simplify right side
   108,718x = 29,915,161,600
5. Step 5: Solve for x
   x = 29,915,161,600/108,718
6. Step 6: Final answer
   x = 275,162.91