Finding the Third Proportional to 190.48 and 272.43

Step by Step Solution

1. Step 1: Write the proportion equation
   190.48 : 272.43 = 272.43 : x
2. Step 2: Convert to fraction form
   190.48/272.43 = 272.43/x
3. Step 3: Cross multiply
   190.48x = 272.43 × 272.43
4. Step 4: Simplify right side
   190.48x = 74,215.81
5. Step 5: Solve for x
   x = 74,215.81/190.48
6. Step 6: Final answer
   x = 389.63