Finding the Third Proportional to 19.22 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   19.22 : 42.18 = 42.18 : x
2. Step 2: Convert to fraction form
   19.22/42.18 = 42.18/x
3. Step 3: Cross multiply
   19.22x = 42.18 × 42.18
4. Step 4: Simplify right side
   19.22x = 1,779.23
5. Step 5: Solve for x
   x = 1,779.23/19.22
6. Step 6: Final answer
   x = 92.56