Finding the Fourth Proportional to 50.77, 69.91 and 42.06

Step by Step Solution

1. Step 1: Write the proportion equation
   50.77 : 69.91 = 42.06 : x
2. Step 2: Convert to fraction form
   50.77/69.91 = 42.06/x
3. Step 3: Cross multiply
   50.77x = 69.91 × 42.06
4. Step 4: Simplify right side
   50.77x = 2,940.41
5. Step 5: Solve for x
   x = 2,940.41/50.77
6. Step 6: Final answer
   x = 57.92