Finding the Third Proportional to 28.72 and 42.23

Step by Step Solution

1. Step 1: Write the proportion equation
   28.72 : 42.23 = 42.23 : x
2. Step 2: Convert to fraction form
   28.72/42.23 = 42.23/x
3. Step 3: Cross multiply
   28.72x = 42.23 × 42.23
4. Step 4: Simplify right side
   28.72x = 1,783.74
5. Step 5: Solve for x
   x = 1,783.74/28.72
6. Step 6: Final answer
   x = 62.11