Finding the Third Proportional to 303,672 and 649,378.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,672 : 649,378.50 = 649,378.50 : x
2. Step 2: Convert to fraction form
   303,672/649,378.50 = 649,378.50/x
3. Step 3: Cross multiply
   303,672x = 649,378.50 × 649,378.50
4. Step 4: Simplify right side
   303,672x = 421,692,436,262.25
5. Step 5: Solve for x
   x = 421,692,436,262.25/303,672
6. Step 6: Final answer
   x = 1,388,644.45