Finding the Third Proportional to 303,684 and 649,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,684 : 649,405.50 = 649,405.50 : x
2. Step 2: Convert to fraction form
   303,684/649,405.50 = 649,405.50/x
3. Step 3: Cross multiply
   303,684x = 649,405.50 × 649,405.50
4. Step 4: Simplify right side
   303,684x = 421,727,503,430.25
5. Step 5: Solve for x
   x = 421,727,503,430.25/303,684
6. Step 6: Final answer
   x = 1,388,705.05