Finding the Fourth Proportional to 123.10, 184.72 and 54.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123.10 : 184.72 = 54.60 : x
2. Step 2: Convert to fraction form
   123.10/184.72 = 54.60/x
3. Step 3: Cross multiply
   123.10x = 184.72 × 54.60
4. Step 4: Simplify right side
   123.10x = 10,085.71
5. Step 5: Solve for x
   x = 10,085.71/123.10
6. Step 6: Final answer
   x = 81.93