Finding the Third Proportional to 401.50 and 604.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401.50 : 604.50 = 604.50 : x
2. Step 2: Convert to fraction form
   401.50/604.50 = 604.50/x
3. Step 3: Cross multiply
   401.50x = 604.50 × 604.50
4. Step 4: Simplify right side
   401.50x = 365,420.25
5. Step 5: Solve for x
   x = 365,420.25/401.50
6. Step 6: Final answer
   x = 910.14