Finding the Fourth Proportional to 127.37, 191.01 and 78.62

Step by Step Solution

1. Step 1: Write the proportion equation
   127.37 : 191.01 = 78.62 : x
2. Step 2: Convert to fraction form
   127.37/191.01 = 78.62/x
3. Step 3: Cross multiply
   127.37x = 191.01 × 78.62
4. Step 4: Simplify right side
   127.37x = 15,016.10
5. Step 5: Solve for x
   x = 15,016.10/127.37
6. Step 6: Final answer
   x = 117.90