Finding the Third Proportional to 274,908 and 425,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   274,908 : 425,662.50 = 425,662.50 : x
2. Step 2: Convert to fraction form
   274,908/425,662.50 = 425,662.50/x
3. Step 3: Cross multiply
   274,908x = 425,662.50 × 425,662.50
4. Step 4: Simplify right side
   274,908x = 181,188,563,906.25
5. Step 5: Solve for x
   x = 181,188,563,906.25/274,908
6. Step 6: Final answer
   x = 659,088.00