Finding the Third Proportional to 108,718 and 172,958

Step by Step Solution

1. Step 1: Write the proportion equation
   108,718 : 172,958 = 172,958 : x
2. Step 2: Convert to fraction form
   108,718/172,958 = 172,958/x
3. Step 3: Cross multiply
   108,718x = 172,958 × 172,958
4. Step 4: Simplify right side
   108,718x = 29,914,469,764
5. Step 5: Solve for x
   x = 29,914,469,764/108,718
6. Step 6: Final answer
   x = 275,156.55