Finding the Third Proportional to 90.49 and 136.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90.49 : 136.37 = 136.37 : x
2. Step 2: Convert to fraction form
   90.49/136.37 = 136.37/x
3. Step 3: Cross multiply
   90.49x = 136.37 × 136.37
4. Step 4: Simplify right side
   90.49x = 18,597.08
5. Step 5: Solve for x
   x = 18,597.08/90.49
6. Step 6: Final answer
   x = 205.51