Finding the Third Proportional to 143.25 and 299.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143.25 : 299.50 = 299.50 : x
2. Step 2: Convert to fraction form
   143.25/299.50 = 299.50/x
3. Step 3: Cross multiply
   143.25x = 299.50 × 299.50
4. Step 4: Simplify right side
   143.25x = 89,700.25
5. Step 5: Solve for x
   x = 89,700.25/143.25
6. Step 6: Final answer
   x = 626.18