Finding the Fourth Proportional to 122.01, 168.38 and 78.27

Step by Step Solution

1. Step 1: Write the proportion equation
   122.01 : 168.38 = 78.27 : x
2. Step 2: Convert to fraction form
   122.01/168.38 = 78.27/x
3. Step 3: Cross multiply
   122.01x = 168.38 × 78.27
4. Step 4: Simplify right side
   122.01x = 13,179.10
5. Step 5: Solve for x
   x = 13,179.10/122.01
6. Step 6: Final answer
   x = 108.02