Finding the Third Proportional to 242.72 and 548.16

Step by Step Solution

1. Step 1: Write the proportion equation
   242.72 : 548.16 = 548.16 : x
2. Step 2: Convert to fraction form
   242.72/548.16 = 548.16/x
3. Step 3: Cross multiply
   242.72x = 548.16 × 548.16
4. Step 4: Simplify right side
   242.72x = 300,475.27
5. Step 5: Solve for x
   x = 300,475.27/242.72
6. Step 6: Final answer
   x = 1,237.96