Finding the Fourth Proportional to 50.68, 69.78 and 50.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50.68 : 69.78 = 50.50 : x
2. Step 2: Convert to fraction form
   50.68/69.78 = 50.50/x
3. Step 3: Cross multiply
   50.68x = 69.78 × 50.50
4. Step 4: Simplify right side
   50.68x = 3,523.89
5. Step 5: Solve for x
   x = 3,523.89/50.68
6. Step 6: Final answer
   x = 69.53