Finding the Fourth Proportional to 50.22, 69.42 and 42.45

Step by Step Solution

1. Step 1: Write the proportion equation
   50.22 : 69.42 = 42.45 : x
2. Step 2: Convert to fraction form
   50.22/69.42 = 42.45/x
3. Step 3: Cross multiply
   50.22x = 69.42 × 42.45
4. Step 4: Simplify right side
   50.22x = 2,946.88
5. Step 5: Solve for x
   x = 2,946.88/50.22
6. Step 6: Final answer
   x = 58.68