Finding the Third Proportional to 272,907 and 425,965.50

Step by Step Solution

1. Step 1: Write the proportion equation
   272,907 : 425,965.50 = 425,965.50 : x
2. Step 2: Convert to fraction form
   272,907/425,965.50 = 425,965.50/x
3. Step 3: Cross multiply
   272,907x = 425,965.50 × 425,965.50
4. Step 4: Simplify right side
   272,907x = 181,446,607,190.25
5. Step 5: Solve for x
   x = 181,446,607,190.25/272,907
6. Step 6: Final answer
   x = 664,866.08