Finding the Third Proportional to 42.47 and 67.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42.47 : 67.22 = 67.22 : x
2. Step 2: Convert to fraction form
   42.47/67.22 = 67.22/x
3. Step 3: Cross multiply
   42.47x = 67.22 × 67.22
4. Step 4: Simplify right side
   42.47x = 4,518.36
5. Step 5: Solve for x
   x = 4,518.36/42.47
6. Step 6: Final answer
   x = 106.39