Finding the Third Proportional to 323,565 and 489,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   323,565 : 489,871.50 = 489,871.50 : x
2. Step 2: Convert to fraction form
   323,565/489,871.50 = 489,871.50/x
3. Step 3: Cross multiply
   323,565x = 489,871.50 × 489,871.50
4. Step 4: Simplify right side
   323,565x = 239,974,086,512.25
5. Step 5: Solve for x
   x = 239,974,086,512.25/323,565
6. Step 6: Final answer
   x = 741,656.50