Finding the Fourth Proportional to 127.50, 191.25 and 42.02

Step by Step Solution

1. Step 1: Write the proportion equation
   127.50 : 191.25 = 42.02 : x
2. Step 2: Convert to fraction form
   127.50/191.25 = 42.02/x
3. Step 3: Cross multiply
   127.50x = 191.25 × 42.02
4. Step 4: Simplify right side
   127.50x = 8,036.33
5. Step 5: Solve for x
   x = 8,036.33/127.50
6. Step 6: Final answer
   x = 63.03