Finding the Fourth Proportional to 76.25, 105.27 and 50.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76.25 : 105.27 = 50.42 : x
2. Step 2: Convert to fraction form
   76.25/105.27 = 50.42/x
3. Step 3: Cross multiply
   76.25x = 105.27 × 50.42
4. Step 4: Simplify right side
   76.25x = 5,307.71
5. Step 5: Solve for x
   x = 5,307.71/76.25
6. Step 6: Final answer
   x = 69.61