Finding the Third Proportional to 172,112 and 374,845

Step by Step Solution

1. Step 1: Write the proportion equation
   172,112 : 374,845 = 374,845 : x
2. Step 2: Convert to fraction form
   172,112/374,845 = 374,845/x
3. Step 3: Cross multiply
   172,112x = 374,845 × 374,845
4. Step 4: Simplify right side
   172,112x = 140,508,774,025
5. Step 5: Solve for x
   x = 140,508,774,025/172,112
6. Step 6: Final answer
   x = 816,379.88