Finding the Third Proportional to 127.20 and 187.00

Step by Step Solution

1. Step 1: Write the proportion equation
   127.20 : 187.00 = 187.00 : x
2. Step 2: Convert to fraction form
   127.20/187.00 = 187.00/x
3. Step 3: Cross multiply
   127.20x = 187.00 × 187.00
4. Step 4: Simplify right side
   127.20x = 34,967.54
5. Step 5: Solve for x
   x = 34,967.54/127.20
6. Step 6: Final answer
   x = 274.91