Finding the Fourth Proportional to 111.74, 154.16 and 68.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111.74 : 154.16 = 68.10 : x
2. Step 2: Convert to fraction form
   111.74/154.16 = 68.10/x
3. Step 3: Cross multiply
   111.74x = 154.16 × 68.10
4. Step 4: Simplify right side
   111.74x = 10,498.30
5. Step 5: Solve for x
   x = 10,498.30/111.74
6. Step 6: Final answer
   x = 93.95