Finding the Third Proportional to 306,970 and 664,383.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,970 : 664,383.50 = 664,383.50 : x
2. Step 2: Convert to fraction form
   306,970/664,383.50 = 664,383.50/x
3. Step 3: Cross multiply
   306,970x = 664,383.50 × 664,383.50
4. Step 4: Simplify right side
   306,970x = 441,405,435,072.25
5. Step 5: Solve for x
   x = 441,405,435,072.25/306,970
6. Step 6: Final answer
   x = 1,437,943.24