Finding the Fourth Proportional to 111.42, 165.98 and 104.77

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 165.98 = 104.77 : x
2. Step 2: Convert to fraction form
   111.42/165.98 = 104.77/x
3. Step 3: Cross multiply
   111.42x = 165.98 × 104.77
4. Step 4: Simplify right side
   111.42x = 17,390.19
5. Step 5: Solve for x
   x = 17,390.19/111.42
6. Step 6: Final answer
   x = 156.08