Finding the Third Proportional to 324,753 and 485,809.50

Step by Step Solution

1. Step 1: Write the proportion equation
   324,753 : 485,809.50 = 485,809.50 : x
2. Step 2: Convert to fraction form
   324,753/485,809.50 = 485,809.50/x
3. Step 3: Cross multiply
   324,753x = 485,809.50 × 485,809.50
4. Step 4: Simplify right side
   324,753x = 236,010,870,290.25
5. Step 5: Solve for x
   x = 236,010,870,290.25/324,753
6. Step 6: Final answer
   x = 726,739.62