Finding the Fourth Proportional to 127.42, 190.73 and 100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   127.42 : 190.73 = 100.42 : x
2. Step 2: Convert to fraction form
   127.42/190.73 = 100.42/x
3. Step 3: Cross multiply
   127.42x = 190.73 × 100.42
4. Step 4: Simplify right side
   127.42x = 19,152.60
5. Step 5: Solve for x
   x = 19,152.60/127.42
6. Step 6: Final answer
   x = 150.31