Finding the Fourth Proportional to 111.70, 154.06 and 68.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111.70 : 154.06 = 68.05 : x
2. Step 2: Convert to fraction form
   111.70/154.06 = 68.05/x
3. Step 3: Cross multiply
   111.70x = 154.06 × 68.05
4. Step 4: Simplify right side
   111.70x = 10,483.78
5. Step 5: Solve for x
   x = 10,483.78/111.70
6. Step 6: Final answer
   x = 93.86