Finding the Fourth Proportional to 127.94, 176.58 and 78.89

Step by Step Solution

1. Step 1: Write the proportion equation
   127.94 : 176.58 = 78.89 : x
2. Step 2: Convert to fraction form
   127.94/176.58 = 78.89/x
3. Step 3: Cross multiply
   127.94x = 176.58 × 78.89
4. Step 4: Simplify right side
   127.94x = 13,929.51
5. Step 5: Solve for x
   x = 13,929.51/127.94
6. Step 6: Final answer
   x = 108.88