Finding the Fourth Proportional to 127.98, 192.06 and 105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   127.98 : 192.06 = 105.30 : x
2. Step 2: Convert to fraction form
   127.98/192.06 = 105.30/x
3. Step 3: Cross multiply
   127.98x = 192.06 × 105.30
4. Step 4: Simplify right side
   127.98x = 20,222.96
5. Step 5: Solve for x
   x = 20,222.96/127.98
6. Step 6: Final answer
   x = 158.02