Finding the Third Proportional to 324,987 and 724,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   324,987 : 724,656.50 = 724,656.50 : x
2. Step 2: Convert to fraction form
   324,987/724,656.50 = 724,656.50/x
3. Step 3: Cross multiply
   324,987x = 724,656.50 × 724,656.50
4. Step 4: Simplify right side
   324,987x = 525,127,042,992.25
5. Step 5: Solve for x
   x = 525,127,042,992.25/324,987
6. Step 6: Final answer
   x = 1,615,840.15