Finding the Fourth Proportional to 111.31, 166.93 and 73.06

Step by Step Solution

1. Step 1: Write the proportion equation
   111.31 : 166.93 = 73.06 : x
2. Step 2: Convert to fraction form
   111.31/166.93 = 73.06/x
3. Step 3: Cross multiply
   111.31x = 166.93 × 73.06
4. Step 4: Simplify right side
   111.31x = 12,195.31
5. Step 5: Solve for x
   x = 12,195.31/111.31
6. Step 6: Final answer
   x = 109.56