Finding the Fourth Proportional to 74.56, 111.89 and 50.21

Step by Step Solution

1. Step 1: Write the proportion equation
   74.56 : 111.89 = 50.21 : x
2. Step 2: Convert to fraction form
   74.56/111.89 = 50.21/x
3. Step 3: Cross multiply
   74.56x = 111.89 × 50.21
4. Step 4: Simplify right side
   74.56x = 5,618.00
5. Step 5: Solve for x
   x = 5,618.00/74.56
6. Step 6: Final answer
   x = 75.35