Finding the Fourth Proportional to 118.10, 162.81 and 83.54

Step by Step Solution

1. Step 1: Write the proportion equation
   118.10 : 162.81 = 83.54 : x
2. Step 2: Convert to fraction form
   118.10/162.81 = 83.54/x
3. Step 3: Cross multiply
   118.10x = 162.81 × 83.54
4. Step 4: Simplify right side
   118.10x = 13,601.15
5. Step 5: Solve for x
   x = 13,601.15/118.10
6. Step 6: Final answer
   x = 115.17