Finding the Fourth Proportional to 118.18, 162.98 and 78.84

Step by Step Solution

1. Step 1: Write the proportion equation
   118.18 : 162.98 = 78.84 : x
2. Step 2: Convert to fraction form
   118.18/162.98 = 78.84/x
3. Step 3: Cross multiply
   118.18x = 162.98 × 78.84
4. Step 4: Simplify right side
   118.18x = 12,849.69
5. Step 5: Solve for x
   x = 12,849.69/118.18
6. Step 6: Final answer
   x = 108.73