Finding the Third Proportional to 324,255 and 485,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   324,255 : 485,086.50 = 485,086.50 : x
2. Step 2: Convert to fraction form
   324,255/485,086.50 = 485,086.50/x
3. Step 3: Cross multiply
   324,255x = 485,086.50 × 485,086.50
4. Step 4: Simplify right side
   324,255x = 235,308,912,482.25
5. Step 5: Solve for x
   x = 235,308,912,482.25/324,255
6. Step 6: Final answer
   x = 725,690.93