Finding the Fourth Proportional to 111.32, 166.82 and 84.29

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 166.82 = 84.29 : x
2. Step 2: Convert to fraction form
   111.32/166.82 = 84.29/x
3. Step 3: Cross multiply
   111.32x = 166.82 × 84.29
4. Step 4: Simplify right side
   111.32x = 14,061.26
5. Step 5: Solve for x
   x = 14,061.26/111.32
6. Step 6: Final answer
   x = 126.31