Finding the Fourth Proportional to 69.50, 104.09 and 50.15

Step by Step Solution

1. Step 1: Write the proportion equation
   69.50 : 104.09 = 50.15 : x
2. Step 2: Convert to fraction form
   69.50/104.09 = 50.15/x
3. Step 3: Cross multiply
   69.50x = 104.09 × 50.15
4. Step 4: Simplify right side
   69.50x = 5,219.34
5. Step 5: Solve for x
   x = 5,219.34/69.50
6. Step 6: Final answer
   x = 75.10