Finding the Third Proportional to 338,475 and 720,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   338,475 : 720,418.50 = 720,418.50 : x
2. Step 2: Convert to fraction form
   338,475/720,418.50 = 720,418.50/x
3. Step 3: Cross multiply
   338,475x = 720,418.50 × 720,418.50
4. Step 4: Simplify right side
   338,475x = 519,002,815,142.25
5. Step 5: Solve for x
   x = 519,002,815,142.25/338,475
6. Step 6: Final answer
   x = 1,533,356.42