Finding the Fourth Proportional to 50.48, 69.72 and 42.34

Step by Step Solution

1. Step 1: Write the proportion equation
   50.48 : 69.72 = 42.34 : x
2. Step 2: Convert to fraction form
   50.48/69.72 = 42.34/x
3. Step 3: Cross multiply
   50.48x = 69.72 × 42.34
4. Step 4: Simplify right side
   50.48x = 2,951.94
5. Step 5: Solve for x
   x = 2,951.94/50.48
6. Step 6: Final answer
   x = 58.48