Finding the Fourth Proportional to 74.73, 111.98 and 42.19

Step by Step Solution

1. Step 1: Write the proportion equation
   74.73 : 111.98 = 42.19 : x
2. Step 2: Convert to fraction form
   74.73/111.98 = 42.19/x
3. Step 3: Cross multiply
   74.73x = 111.98 × 42.19
4. Step 4: Simplify right side
   74.73x = 4,724.89
5. Step 5: Solve for x
   x = 4,724.89/74.73
6. Step 6: Final answer
   x = 63.22