Finding the Third Proportional to 172,108.50 and 374,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,108.50 : 374,837.50 = 374,837.50 : x
2. Step 2: Convert to fraction form
   172,108.50/374,837.50 = 374,837.50/x
3. Step 3: Cross multiply
   172,108.50x = 374,837.50 × 374,837.50
4. Step 4: Simplify right side
   172,108.50x = 140,503,151,406.25
5. Step 5: Solve for x
   x = 140,503,151,406.25/172,108.50
6. Step 6: Final answer
   x = 816,363.81