Finding the Fourth Proportional to 50.42, 69.59 and 40.09

Step by Step Solution

1. Step 1: Write the proportion equation
   50.42 : 69.59 = 40.09 : x
2. Step 2: Convert to fraction form
   50.42/69.59 = 40.09/x
3. Step 3: Cross multiply
   50.42x = 69.59 × 40.09
4. Step 4: Simplify right side
   50.42x = 2,789.86
5. Step 5: Solve for x
   x = 2,789.86/50.42
6. Step 6: Final answer
   x = 55.33