Finding the Third Proportional to 366,872 and 489,207.50

Step by Step Solution

1. Step 1: Write the proportion equation
   366,872 : 489,207.50 = 489,207.50 : x
2. Step 2: Convert to fraction form
   366,872/489,207.50 = 489,207.50/x
3. Step 3: Cross multiply
   366,872x = 489,207.50 × 489,207.50
4. Step 4: Simplify right side
   366,872x = 239,323,978,056.25
5. Step 5: Solve for x
   x = 239,323,978,056.25/366,872
6. Step 6: Final answer
   x = 652,336.45