Finding the Third Proportional to 19.43 and 42.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19.43 : 42.72 = 42.72 : x
2. Step 2: Convert to fraction form
   19.43/42.72 = 42.72/x
3. Step 3: Cross multiply
   19.43x = 42.72 × 42.72
4. Step 4: Simplify right side
   19.43x = 1,824.62
5. Step 5: Solve for x
   x = 1,824.62/19.43
6. Step 6: Final answer
   x = 93.89