Finding the Third Proportional to 123.38 and 272.63

Step by Step Solution

1. Step 1: Write the proportion equation
   123.38 : 272.63 = 272.63 : x
2. Step 2: Convert to fraction form
   123.38/272.63 = 272.63/x
3. Step 3: Cross multiply
   123.38x = 272.63 × 272.63
4. Step 4: Simplify right side
   123.38x = 74,324.39
5. Step 5: Solve for x
   x = 74,324.39/123.38
6. Step 6: Final answer
   x = 602.43