Finding the Fourth Proportional to 42.02, 63.01 and 19.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42.02 : 63.01 = 19.18 : x
2. Step 2: Convert to fraction form
   42.02/63.01 = 19.18/x
3. Step 3: Cross multiply
   42.02x = 63.01 × 19.18
4. Step 4: Simplify right side
   42.02x = 1,208.69
5. Step 5: Solve for x
   x = 1,208.69/42.02
6. Step 6: Final answer
   x = 28.76