Finding the Third Proportional to 20.06 and 42.63

Step by Step Solution

1. Step 1: Write the proportion equation
   20.06 : 42.63 = 42.63 : x
2. Step 2: Convert to fraction form
   20.06/42.63 = 42.63/x
3. Step 3: Cross multiply
   20.06x = 42.63 × 42.63
4. Step 4: Simplify right side
   20.06x = 1,816.89
5. Step 5: Solve for x
   x = 1,816.89/20.06
6. Step 6: Final answer
   x = 90.56