Finding the Third Proportional to 303,280.50 and 649,164

Step by Step Solution

1. Step 1: Write the proportion equation
   303,280.50 : 649,164 = 649,164 : x
2. Step 2: Convert to fraction form
   303,280.50/649,164 = 649,164/x
3. Step 3: Cross multiply
   303,280.50x = 649,164 × 649,164
4. Step 4: Simplify right side
   303,280.50x = 421,413,898,896
5. Step 5: Solve for x
   x = 421,413,898,896/303,280.50
6. Step 6: Final answer
   x = 1,389,518.61