Finding the Fourth Proportional to 74.71, 111.97 and 42.22

Step by Step Solution

1. Step 1: Write the proportion equation
   74.71 : 111.97 = 42.22 : x
2. Step 2: Convert to fraction form
   74.71/111.97 = 42.22/x
3. Step 3: Cross multiply
   74.71x = 111.97 × 42.22
4. Step 4: Simplify right side
   74.71x = 4,727.37
5. Step 5: Solve for x
   x = 4,727.37/74.71
6. Step 6: Final answer
   x = 63.28