Finding the Fourth Proportional to 273.98, 410.72 and 111.55

Step by Step Solution

1. Step 1: Write the proportion equation
   273.98 : 410.72 = 111.55 : x
2. Step 2: Convert to fraction form
   273.98/410.72 = 111.55/x
3. Step 3: Cross multiply
   273.98x = 410.72 × 111.55
4. Step 4: Simplify right side
   273.98x = 45,815.82
5. Step 5: Solve for x
   x = 45,815.82/273.98
6. Step 6: Final answer
   x = 167.22