Finding the Third Proportional to 417.25 and 614.50

Step by Step Solution

1. Step 1: Write the proportion equation
   417.25 : 614.50 = 614.50 : x
2. Step 2: Convert to fraction form
   417.25/614.50 = 614.50/x
3. Step 3: Cross multiply
   417.25x = 614.50 × 614.50
4. Step 4: Simplify right side
   417.25x = 377,610.25
5. Step 5: Solve for x
   x = 377,610.25/417.25
6. Step 6: Final answer
   x = 905.00