Finding the Fourth Proportional to 111.59, 168.23 and 103.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111.59 : 168.23 = 103.76 : x
2. Step 2: Convert to fraction form
   111.59/168.23 = 103.76/x
3. Step 3: Cross multiply
   111.59x = 168.23 × 103.76
4. Step 4: Simplify right side
   111.59x = 17,454.18
5. Step 5: Solve for x
   x = 17,454.18/111.59
6. Step 6: Final answer
   x = 156.42