Finding the Fourth Proportional to 111.59, 168.16 and 100.77

Step by Step Solution

1. Step 1: Write the proportion equation
   111.59 : 168.16 = 100.77 : x
2. Step 2: Convert to fraction form
   111.59/168.16 = 100.77/x
3. Step 3: Cross multiply
   111.59x = 168.16 × 100.77
4. Step 4: Simplify right side
   111.59x = 16,945.48
5. Step 5: Solve for x
   x = 16,945.48/111.59
6. Step 6: Final answer
   x = 151.85