Finding the Third Proportional to 86.38 and 130.38

Step by Step Solution

1. Step 1: Write the proportion equation
   86.38 : 130.38 = 130.38 : x
2. Step 2: Convert to fraction form
   86.38/130.38 = 130.38/x
3. Step 3: Cross multiply
   86.38x = 130.38 × 130.38
4. Step 4: Simplify right side
   86.38x = 16,997.64
5. Step 5: Solve for x
   x = 16,997.64/86.38
6. Step 6: Final answer
   x = 196.79