Finding the Third Proportional to 15.42 and 27.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15.42 : 27.72 = 27.72 : x
2. Step 2: Convert to fraction form
   15.42/27.72 = 27.72/x
3. Step 3: Cross multiply
   15.42x = 27.72 × 27.72
4. Step 4: Simplify right side
   15.42x = 768.33
5. Step 5: Solve for x
   x = 768.33/15.42
6. Step 6: Final answer
   x = 49.82