Finding the Fourth Proportional to 74.42, 111.69 and 50.39

Step by Step Solution

1. Step 1: Write the proportion equation
   74.42 : 111.69 = 50.39 : x
2. Step 2: Convert to fraction form
   74.42/111.69 = 50.39/x
3. Step 3: Cross multiply
   74.42x = 111.69 × 50.39
4. Step 4: Simplify right side
   74.42x = 5,628.06
5. Step 5: Solve for x
   x = 5,628.06/74.42
6. Step 6: Final answer
   x = 75.63