Finding the Third Proportional to 311,739 and 483,648

Step by Step Solution

1. Step 1: Write the proportion equation
   311,739 : 483,648 = 483,648 : x
2. Step 2: Convert to fraction form
   311,739/483,648 = 483,648/x
3. Step 3: Cross multiply
   311,739x = 483,648 × 483,648
4. Step 4: Simplify right side
   311,739x = 233,915,387,904
5. Step 5: Solve for x
   x = 233,915,387,904/311,739
6. Step 6: Final answer
   x = 750,356.51