Finding the Third Proportional to 674.50 and 719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   674.50 : 719.50 = 719.50 : x
2. Step 2: Convert to fraction form
   674.50/719.50 = 719.50/x
3. Step 3: Cross multiply
   674.50x = 719.50 × 719.50
4. Step 4: Simplify right side
   674.50x = 517,680.25
5. Step 5: Solve for x
   x = 517,680.25/674.50
6. Step 6: Final answer
   x = 767.50