Finding the Third Proportional to 356,848 and 489,322.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,848 : 489,322.50 = 489,322.50 : x
2. Step 2: Convert to fraction form
   356,848/489,322.50 = 489,322.50/x
3. Step 3: Cross multiply
   356,848x = 489,322.50 × 489,322.50
4. Step 4: Simplify right side
   356,848x = 239,436,509,006.25
5. Step 5: Solve for x
   x = 239,436,509,006.25/356,848
6. Step 6: Final answer
   x = 670,976.18