Finding the Fourth Proportional to 103.69, 155.39 and 69.49

Step by Step Solution

1. Step 1: Write the proportion equation
   103.69 : 155.39 = 69.49 : x
2. Step 2: Convert to fraction form
   103.69/155.39 = 69.49/x
3. Step 3: Cross multiply
   103.69x = 155.39 × 69.49
4. Step 4: Simplify right side
   103.69x = 10,797.32
5. Step 5: Solve for x
   x = 10,797.32/103.69
6. Step 6: Final answer
   x = 104.13