Finding the Third Proportional to 336,665 and 720,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   336,665 : 720,620.50 = 720,620.50 : x
2. Step 2: Convert to fraction form
   336,665/720,620.50 = 720,620.50/x
3. Step 3: Cross multiply
   336,665x = 720,620.50 × 720,620.50
4. Step 4: Simplify right side
   336,665x = 519,293,905,020.25
5. Step 5: Solve for x
   x = 519,293,905,020.25/336,665
6. Step 6: Final answer
   x = 1,542,464.78