Finding the Fourth Proportional to 127.86, 191.60 and 123.42

Step by Step Solution

1. Step 1: Write the proportion equation
   127.86 : 191.60 = 123.42 : x
2. Step 2: Convert to fraction form
   127.86/191.60 = 123.42/x
3. Step 3: Cross multiply
   127.86x = 191.60 × 123.42
4. Step 4: Simplify right side
   127.86x = 23,647.27
5. Step 5: Solve for x
   x = 23,647.27/127.86
6. Step 6: Final answer
   x = 184.95