Finding the Fourth Proportional to 111.29, 166.69 and 83.93

Step by Step Solution

1. Step 1: Write the proportion equation
   111.29 : 166.69 = 83.93 : x
2. Step 2: Convert to fraction form
   111.29/166.69 = 83.93/x
3. Step 3: Cross multiply
   111.29x = 166.69 × 83.93
4. Step 4: Simplify right side
   111.29x = 13,990.50
5. Step 5: Solve for x
   x = 13,990.50/111.29
6. Step 6: Final answer
   x = 125.72