Finding the Fourth Proportional to 127.88, 191.67 and 107.83

Step by Step Solution

1. Step 1: Write the proportion equation
   127.88 : 191.67 = 107.83 : x
2. Step 2: Convert to fraction form
   127.88/191.67 = 107.83/x
3. Step 3: Cross multiply
   127.88x = 191.67 × 107.83
4. Step 4: Simplify right side
   127.88x = 20,667.61
5. Step 5: Solve for x
   x = 20,667.61/127.88
6. Step 6: Final answer
   x = 161.62