Finding the Third Proportional to 90.28 and 137.95

Step by Step Solution

1. Step 1: Write the proportion equation
   90.28 : 137.95 = 137.95 : x
2. Step 2: Convert to fraction form
   90.28/137.95 = 137.95/x
3. Step 3: Cross multiply
   90.28x = 137.95 × 137.95
4. Step 4: Simplify right side
   90.28x = 19,031.06
5. Step 5: Solve for x
   x = 19,031.06/90.28
6. Step 6: Final answer
   x = 210.80