Finding the Fourth Proportional to 111.71, 154.22 and 68.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111.71 : 154.22 = 68.10 : x
2. Step 2: Convert to fraction form
   111.71/154.22 = 68.10/x
3. Step 3: Cross multiply
   111.71x = 154.22 × 68.10
4. Step 4: Simplify right side
   111.71x = 10,502.04
5. Step 5: Solve for x
   x = 10,502.04/111.71
6. Step 6: Final answer
   x = 94.02