Finding the Fourth Proportional to 111.76, 154.24 and 68.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111.76 : 154.24 = 68.10 : x
2. Step 2: Convert to fraction form
   111.76/154.24 = 68.10/x
3. Step 3: Cross multiply
   111.76x = 154.24 × 68.10
4. Step 4: Simplify right side
   111.76x = 10,503.74
5. Step 5: Solve for x
   x = 10,503.74/111.76
6. Step 6: Final answer
   x = 93.98