Finding the Fourth Proportional to 111.10, 166.71 and 70.37

Step by Step Solution

1. Step 1: Write the proportion equation
   111.10 : 166.71 = 70.37 : x
2. Step 2: Convert to fraction form
   111.10/166.71 = 70.37/x
3. Step 3: Cross multiply
   111.10x = 166.71 × 70.37
4. Step 4: Simplify right side
   111.10x = 11,731.38
5. Step 5: Solve for x
   x = 11,731.38/111.10
6. Step 6: Final answer
   x = 105.60