Finding the Fourth Proportional to 123.12, 184.42 and 100.18

Step by Step Solution

1. Step 1: Write the proportion equation
   123.12 : 184.42 = 100.18 : x
2. Step 2: Convert to fraction form
   123.12/184.42 = 100.18/x
3. Step 3: Cross multiply
   123.12x = 184.42 × 100.18
4. Step 4: Simplify right side
   123.12x = 18,475.20
5. Step 5: Solve for x
   x = 18,475.20/123.12
6. Step 6: Final answer
   x = 150.06