Finding the Third Proportional to 172,039.50 and 356,175

Step by Step Solution

1. Step 1: Write the proportion equation
   172,039.50 : 356,175 = 356,175 : x
2. Step 2: Convert to fraction form
   172,039.50/356,175 = 356,175/x
3. Step 3: Cross multiply
   172,039.50x = 356,175 × 356,175
4. Step 4: Simplify right side
   172,039.50x = 126,860,630,625
5. Step 5: Solve for x
   x = 126,860,630,625/172,039.50
6. Step 6: Final answer
   x = 737,392.46