Finding the Fourth Proportional to 111.50, 153.55 and 111.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111.50 : 153.55 = 111.16 : x
2. Step 2: Convert to fraction form
   111.50/153.55 = 111.16/x
3. Step 3: Cross multiply
   111.50x = 153.55 × 111.16
4. Step 4: Simplify right side
   111.50x = 17,068.34
5. Step 5: Solve for x
   x = 17,068.34/111.50
6. Step 6: Final answer
   x = 153.08