Finding the Fourth Proportional to 118.08, 162.72 and 83.52

Step by Step Solution

1. Step 1: Write the proportion equation
   118.08 : 162.72 = 83.52 : x
2. Step 2: Convert to fraction form
   118.08/162.72 = 83.52/x
3. Step 3: Cross multiply
   118.08x = 162.72 × 83.52
4. Step 4: Simplify right side
   118.08x = 13,590.37
5. Step 5: Solve for x
   x = 13,590.37/118.08
6. Step 6: Final answer
   x = 115.09