Finding the Fourth Proportional to 127.59, 176.01 and 78.39

Step by Step Solution

1. Step 1: Write the proportion equation
   127.59 : 176.01 = 78.39 : x
2. Step 2: Convert to fraction form
   127.59/176.01 = 78.39/x
3. Step 3: Cross multiply
   127.59x = 176.01 × 78.39
4. Step 4: Simplify right side
   127.59x = 13,797.42
5. Step 5: Solve for x
   x = 13,797.42/127.59
6. Step 6: Final answer
   x = 108.14