Finding the Fourth Proportional to 111.52, 168.13 and 104.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111.52 : 168.13 = 104.56 : x
2. Step 2: Convert to fraction form
   111.52/168.13 = 104.56/x
3. Step 3: Cross multiply
   111.52x = 168.13 × 104.56
4. Step 4: Simplify right side
   111.52x = 17,579.67
5. Step 5: Solve for x
   x = 17,579.67/111.52
6. Step 6: Final answer
   x = 157.64