Finding the Fourth Proportional to 111.84, 168.56 and 104

Step by Step Solution

1. Step 1: Write the proportion equation
   111.84 : 168.56 = 104 : x
2. Step 2: Convert to fraction form
   111.84/168.56 = 104/x
3. Step 3: Cross multiply
   111.84x = 168.56 × 104
4. Step 4: Simplify right side
   111.84x = 17,530.24
5. Step 5: Solve for x
   x = 17,530.24/111.84
6. Step 6: Final answer
   x = 156.74