Finding the Fourth Proportional to 111.00, 166.38 and 89.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111.00 : 166.38 = 89.23 : x
2. Step 2: Convert to fraction form
   111.00/166.38 = 89.23/x
3. Step 3: Cross multiply
   111.00x = 166.38 × 89.23
4. Step 4: Simplify right side
   111.00x = 14,845.34
5. Step 5: Solve for x
   x = 14,845.34/111.00
6. Step 6: Final answer
   x = 133.75