Finding the Third Proportional to 56.38 and 123.31

Step by Step Solution

1. Step 1: Write the proportion equation
   56.38 : 123.31 = 123.31 : x
2. Step 2: Convert to fraction form
   56.38/123.31 = 123.31/x
3. Step 3: Cross multiply
   56.38x = 123.31 × 123.31
4. Step 4: Simplify right side
   56.38x = 15,205.97
5. Step 5: Solve for x
   x = 15,205.97/56.38
6. Step 6: Final answer
   x = 269.73