Finding the Third Proportional to 90.56 and 122.63

Step by Step Solution

1. Step 1: Write the proportion equation
   90.56 : 122.63 = 122.63 : x
2. Step 2: Convert to fraction form
   90.56/122.63 = 122.63/x
3. Step 3: Cross multiply
   90.56x = 122.63 × 122.63
4. Step 4: Simplify right side
   90.56x = 15,036.89
5. Step 5: Solve for x
   x = 15,036.89/90.56
6. Step 6: Final answer
   x = 166.04