Finding the Fourth Proportional to 113.34, 155.39 and 111.29

Step by Step Solution

1. Step 1: Write the proportion equation
   113.34 : 155.39 = 111.29 : x
2. Step 2: Convert to fraction form
   113.34/155.39 = 111.29/x
3. Step 3: Cross multiply
   113.34x = 155.39 × 111.29
4. Step 4: Simplify right side
   113.34x = 17,292.85
5. Step 5: Solve for x
   x = 17,292.85/113.34
6. Step 6: Final answer
   x = 152.58