Finding the Third Proportional to 253.56 and 548.89

Step by Step Solution

1. Step 1: Write the proportion equation
   253.56 : 548.89 = 548.89 : x
2. Step 2: Convert to fraction form
   253.56/548.89 = 548.89/x
3. Step 3: Cross multiply
   253.56x = 548.89 × 548.89
4. Step 4: Simplify right side
   253.56x = 301,275.56
5. Step 5: Solve for x
   x = 301,275.56/253.56
6. Step 6: Final answer
   x = 1,188.18