Finding the Fourth Proportional to 50.64, 69.84 and 42.42

Step by Step Solution

1. Step 1: Write the proportion equation
   50.64 : 69.84 = 42.42 : x
2. Step 2: Convert to fraction form
   50.64/69.84 = 42.42/x
3. Step 3: Cross multiply
   50.64x = 69.84 × 42.42
4. Step 4: Simplify right side
   50.64x = 2,962.61
5. Step 5: Solve for x
   x = 2,962.61/50.64
6. Step 6: Final answer
   x = 58.50