Finding the Third Proportional to 143.98 and 303.45

Step by Step Solution

1. Step 1: Write the proportion equation
   143.98 : 303.45 = 303.45 : x
2. Step 2: Convert to fraction form
   143.98/303.45 = 303.45/x
3. Step 3: Cross multiply
   143.98x = 303.45 × 303.45
4. Step 4: Simplify right side
   143.98x = 92,083.95
5. Step 5: Solve for x
   x = 92,083.95/143.98
6. Step 6: Final answer
   x = 639.54