Finding the Third Proportional to 143.12 and 308.29

Step by Step Solution

1. Step 1: Write the proportion equation
   143.12 : 308.29 = 308.29 : x
2. Step 2: Convert to fraction form
   143.12/308.29 = 308.29/x
3. Step 3: Cross multiply
   143.12x = 308.29 × 308.29
4. Step 4: Simplify right side
   143.12x = 95,039.74
5. Step 5: Solve for x
   x = 95,039.74/143.12
6. Step 6: Final answer
   x = 664.05