Finding the Fourth Proportional to 50.28, 69.33 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   50.28 : 69.33 = 42.18 : x
2. Step 2: Convert to fraction form
   50.28/69.33 = 42.18/x
3. Step 3: Cross multiply
   50.28x = 69.33 × 42.18
4. Step 4: Simplify right side
   50.28x = 2,924.34
5. Step 5: Solve for x
   x = 2,924.34/50.28
6. Step 6: Final answer
   x = 58.16