Finding the Fourth Proportional to 127.73, 176.18 and 78.54

Step by Step Solution

1. Step 1: Write the proportion equation
   127.73 : 176.18 = 78.54 : x
2. Step 2: Convert to fraction form
   127.73/176.18 = 78.54/x
3. Step 3: Cross multiply
   127.73x = 176.18 × 78.54
4. Step 4: Simplify right side
   127.73x = 13,836.78
5. Step 5: Solve for x
   x = 13,836.78/127.73
6. Step 6: Final answer
   x = 108.33