Finding the Third Proportional to 108,909 and 173,412

Step by Step Solution

1. Step 1: Write the proportion equation
   108,909 : 173,412 = 173,412 : x
2. Step 2: Convert to fraction form
   108,909/173,412 = 173,412/x
3. Step 3: Cross multiply
   108,909x = 173,412 × 173,412
4. Step 4: Simplify right side
   108,909x = 30,071,721,744
5. Step 5: Solve for x
   x = 30,071,721,744/108,909
6. Step 6: Final answer
   x = 276,117.88