Finding the Third Proportional to 320,439 and 483,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,439 : 483,112.50 = 483,112.50 : x
2. Step 2: Convert to fraction form
   320,439/483,112.50 = 483,112.50/x
3. Step 3: Cross multiply
   320,439x = 483,112.50 × 483,112.50
4. Step 4: Simplify right side
   320,439x = 233,397,687,656.25
5. Step 5: Solve for x
   x = 233,397,687,656.25/320,439
6. Step 6: Final answer
   x = 728,368.54