Finding the Third Proportional to 172,111 and 374,843

Step by Step Solution

1. Step 1: Write the proportion equation
   172,111 : 374,843 = 374,843 : x
2. Step 2: Convert to fraction form
   172,111/374,843 = 374,843/x
3. Step 3: Cross multiply
   172,111x = 374,843 × 374,843
4. Step 4: Simplify right side
   172,111x = 140,507,274,649
5. Step 5: Solve for x
   x = 140,507,274,649/172,111
6. Step 6: Final answer
   x = 816,375.91