Finding the Fourth Proportional to 123.36, 185.07 and 72.05

Step by Step Solution

1. Step 1: Write the proportion equation
   123.36 : 185.07 = 72.05 : x
2. Step 2: Convert to fraction form
   123.36/185.07 = 72.05/x
3. Step 3: Cross multiply
   123.36x = 185.07 × 72.05
4. Step 4: Simplify right side
   123.36x = 13,333.01
5. Step 5: Solve for x
   x = 13,333.01/123.36
6. Step 6: Final answer
   x = 108.08