Finding the Third Proportional to 356,782 and 489,250.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,782 : 489,250.50 = 489,250.50 : x
2. Step 2: Convert to fraction form
   356,782/489,250.50 = 489,250.50/x
3. Step 3: Cross multiply
   356,782x = 489,250.50 × 489,250.50
4. Step 4: Simplify right side
   356,782x = 239,366,051,750.25
5. Step 5: Solve for x
   x = 239,366,051,750.25/356,782
6. Step 6: Final answer
   x = 670,902.83