Finding the Fourth Proportional to 123.36, 185.06 and 71.98

Step by Step Solution

1. Step 1: Write the proportion equation
   123.36 : 185.06 = 71.98 : x
2. Step 2: Convert to fraction form
   123.36/185.06 = 71.98/x
3. Step 3: Cross multiply
   123.36x = 185.06 × 71.98
4. Step 4: Simplify right side
   123.36x = 13,320.62
5. Step 5: Solve for x
   x = 13,320.62/123.36
6. Step 6: Final answer
   x = 107.98