Finding the Fourth Proportional to 69.78, 104.59 and 50.23

Step by Step Solution

1. Step 1: Write the proportion equation
   69.78 : 104.59 = 50.23 : x
2. Step 2: Convert to fraction form
   69.78/104.59 = 50.23/x
3. Step 3: Cross multiply
   69.78x = 104.59 × 50.23
4. Step 4: Simplify right side
   69.78x = 5,253.43
5. Step 5: Solve for x
   x = 5,253.43/69.78
6. Step 6: Final answer
   x = 75.28