Finding the Third Proportional to 127.43 and 155.91

Step by Step Solution

1. Step 1: Write the proportion equation
   127.43 : 155.91 = 155.91 : x
2. Step 2: Convert to fraction form
   127.43/155.91 = 155.91/x
3. Step 3: Cross multiply
   127.43x = 155.91 × 155.91
4. Step 4: Simplify right side
   127.43x = 24,307.67
5. Step 5: Solve for x
   x = 24,307.67/127.43
6. Step 6: Final answer
   x = 190.75