Finding the Fourth Proportional to 111.76, 154.99 and 100.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111.76 : 154.99 = 100.96 : x
2. Step 2: Convert to fraction form
   111.76/154.99 = 100.96/x
3. Step 3: Cross multiply
   111.76x = 154.99 × 100.96
4. Step 4: Simplify right side
   111.76x = 15,647.79
5. Step 5: Solve for x
   x = 15,647.79/111.76
6. Step 6: Final answer
   x = 140.01