Finding the Third Proportional to 303,643.50 and 649,333.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,643.50 : 649,333.50 = 649,333.50 : x
2. Step 2: Convert to fraction form
   303,643.50/649,333.50 = 649,333.50/x
3. Step 3: Cross multiply
   303,643.50x = 649,333.50 × 649,333.50
4. Step 4: Simplify right side
   303,643.50x = 421,633,994,222.25
5. Step 5: Solve for x
   x = 421,633,994,222.25/303,643.50
6. Step 6: Final answer
   x = 1,388,582.32