Finding the Third Proportional to 308.81 and 667.13

Step by Step Solution

1. Step 1: Write the proportion equation
   308.81 : 667.13 = 667.13 : x
2. Step 2: Convert to fraction form
   308.81/667.13 = 667.13/x
3. Step 3: Cross multiply
   308.81x = 667.13 × 667.13
4. Step 4: Simplify right side
   308.81x = 445,055.77
5. Step 5: Solve for x
   x = 445,055.77/308.81
6. Step 6: Final answer
   x = 1,441.18