Finding the Fourth Proportional to 118.18, 162.92 and 76.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118.18 : 162.92 = 76.72 : x
2. Step 2: Convert to fraction form
   118.18/162.92 = 76.72/x
3. Step 3: Cross multiply
   118.18x = 162.92 × 76.72
4. Step 4: Simplify right side
   118.18x = 12,499.22
5. Step 5: Solve for x
   x = 12,499.22/118.18
6. Step 6: Final answer
   x = 105.76