Finding the Third Proportional to 140.56 and 308.15

Step by Step Solution

1. Step 1: Write the proportion equation
   140.56 : 308.15 = 308.15 : x
2. Step 2: Convert to fraction form
   140.56/308.15 = 308.15/x
3. Step 3: Cross multiply
   140.56x = 308.15 × 308.15
4. Step 4: Simplify right side
   140.56x = 94,954.91
5. Step 5: Solve for x
   x = 94,954.91/140.56
6. Step 6: Final answer
   x = 675.55