Finding the Third Proportional to 131.63 and 318.94

Step by Step Solution

1. Step 1: Write the proportion equation
   131.63 : 318.94 = 318.94 : x
2. Step 2: Convert to fraction form
   131.63/318.94 = 318.94/x
3. Step 3: Cross multiply
   131.63x = 318.94 × 318.94
4. Step 4: Simplify right side
   131.63x = 101,721.13
5. Step 5: Solve for x
   x = 101,721.13/131.63
6. Step 6: Final answer
   x = 772.81