Finding the Third Proportional to 59.91 and 136.48

Step by Step Solution

1. Step 1: Write the proportion equation
   59.91 : 136.48 = 136.48 : x
2. Step 2: Convert to fraction form
   59.91/136.48 = 136.48/x
3. Step 3: Cross multiply
   59.91x = 136.48 × 136.48
4. Step 4: Simplify right side
   59.91x = 18,625.85
5. Step 5: Solve for x
   x = 18,625.85/59.91
6. Step 6: Final answer
   x = 310.92