Finding the Fourth Proportional to 111.46, 153.72 and 83.44

Step by Step Solution

1. Step 1: Write the proportion equation
   111.46 : 153.72 = 83.44 : x
2. Step 2: Convert to fraction form
   111.46/153.72 = 83.44/x
3. Step 3: Cross multiply
   111.46x = 153.72 × 83.44
4. Step 4: Simplify right side
   111.46x = 12,826.40
5. Step 5: Solve for x
   x = 12,826.40/111.46
6. Step 6: Final answer
   x = 115.08