Finding the Third Proportional to 307,209 and 649,463.25

Step by Step Solution

1. Step 1: Write the proportion equation
   307,209 : 649,463.25 = 649,463.25 : x
2. Step 2: Convert to fraction form
   307,209/649,463.25 = 649,463.25/x
3. Step 3: Cross multiply
   307,209x = 649,463.25 × 649,463.25
4. Step 4: Simplify right side
   307,209x = 421,802,513,100.56
5. Step 5: Solve for x
   x = 421,802,513,100.56/307,209
6. Step 6: Final answer
   x = 1,373,014.83