Finding the Fourth Proportional to 116.55, 160.17 and 111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   116.55 : 160.17 = 111.20 : x
2. Step 2: Convert to fraction form
   116.55/160.17 = 111.20/x
3. Step 3: Cross multiply
   116.55x = 160.17 × 111.20
4. Step 4: Simplify right side
   116.55x = 17,810.10
5. Step 5: Solve for x
   x = 17,810.10/116.55
6. Step 6: Final answer
   x = 152.81