Finding the Fourth Proportional to 111.34, 166.98 and 70.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111.34 : 166.98 = 70.69 : x
2. Step 2: Convert to fraction form
   111.34/166.98 = 70.69/x
3. Step 3: Cross multiply
   111.34x = 166.98 × 70.69
4. Step 4: Simplify right side
   111.34x = 11,803.82
5. Step 5: Solve for x
   x = 11,803.82/111.34
6. Step 6: Final answer
   x = 106.02