Finding the Fourth Proportional to 127.27, 175.72 and 78.22

Step by Step Solution

1. Step 1: Write the proportion equation
   127.27 : 175.72 = 78.22 : x
2. Step 2: Convert to fraction form
   127.27/175.72 = 78.22/x
3. Step 3: Cross multiply
   127.27x = 175.72 × 78.22
4. Step 4: Simplify right side
   127.27x = 13,744.00
5. Step 5: Solve for x
   x = 13,744.00/127.27
6. Step 6: Final answer
   x = 107.99