Finding the Fourth Proportional to 123.20, 184.82 and 54.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123.20 : 184.82 = 54.72 : x
2. Step 2: Convert to fraction form
   123.20/184.82 = 54.72/x
3. Step 3: Cross multiply
   123.20x = 184.82 × 54.72
4. Step 4: Simplify right side
   123.20x = 10,112.56
5. Step 5: Solve for x
   x = 10,112.56/123.20
6. Step 6: Final answer
   x = 82.09