Finding the Third Proportional to 55.53 and 123.87

Step by Step Solution

1. Step 1: Write the proportion equation
   55.53 : 123.87 = 123.87 : x
2. Step 2: Convert to fraction form
   55.53/123.87 = 123.87/x
3. Step 3: Cross multiply
   55.53x = 123.87 × 123.87
4. Step 4: Simplify right side
   55.53x = 15,344.53
5. Step 5: Solve for x
   x = 15,344.53/55.53
6. Step 6: Final answer
   x = 276.33