Finding the Third Proportional to 172,972 and 379,996

Step by Step Solution

1. Step 1: Write the proportion equation
   172,972 : 379,996 = 379,996 : x
2. Step 2: Convert to fraction form
   172,972/379,996 = 379,996/x
3. Step 3: Cross multiply
   172,972x = 379,996 × 379,996
4. Step 4: Simplify right side
   172,972x = 144,396,960,016
5. Step 5: Solve for x
   x = 144,396,960,016/172,972
6. Step 6: Final answer
   x = 834,799.62