Finding the Third Proportional to 356,750 and 489,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,750 : 489,196.50 = 489,196.50 : x
2. Step 2: Convert to fraction form
   356,750/489,196.50 = 489,196.50/x
3. Step 3: Cross multiply
   356,750x = 489,196.50 × 489,196.50
4. Step 4: Simplify right side
   356,750x = 239,313,215,612.25
5. Step 5: Solve for x
   x = 239,313,215,612.25/356,750
6. Step 6: Final answer
   x = 670,814.90