Finding the Third Proportional to 79,149 and 173,309

Step by Step Solution

1. Step 1: Write the proportion equation
   79,149 : 173,309 = 173,309 : x
2. Step 2: Convert to fraction form
   79,149/173,309 = 173,309/x
3. Step 3: Cross multiply
   79,149x = 173,309 × 173,309
4. Step 4: Simplify right side
   79,149x = 30,036,009,481
5. Step 5: Solve for x
   x = 30,036,009,481/79,149
6. Step 6: Final answer
   x = 379,486.91