Finding the Third Proportional to 320,434 and 483,105

Step by Step Solution

1. Step 1: Write the proportion equation
   320,434 : 483,105 = 483,105 : x
2. Step 2: Convert to fraction form
   320,434/483,105 = 483,105/x
3. Step 3: Cross multiply
   320,434x = 483,105 × 483,105
4. Step 4: Simplify right side
   320,434x = 233,390,441,025
5. Step 5: Solve for x
   x = 233,390,441,025/320,434
6. Step 6: Final answer
   x = 728,357.29