Finding the Third Proportional to 306,082.50 and 649,218

Step by Step Solution

1. Step 1: Write the proportion equation
   306,082.50 : 649,218 = 649,218 : x
2. Step 2: Convert to fraction form
   306,082.50/649,218 = 649,218/x
3. Step 3: Cross multiply
   306,082.50x = 649,218 × 649,218
4. Step 4: Simplify right side
   306,082.50x = 421,484,011,524
5. Step 5: Solve for x
   x = 421,484,011,524/306,082.50
6. Step 6: Final answer
   x = 1,377,027.47