Finding the Fourth Proportional to 123.42, 185.09 and 65.61

Step by Step Solution

1. Step 1: Write the proportion equation
   123.42 : 185.09 = 65.61 : x
2. Step 2: Convert to fraction form
   123.42/185.09 = 65.61/x
3. Step 3: Cross multiply
   123.42x = 185.09 × 65.61
4. Step 4: Simplify right side
   123.42x = 12,143.43
5. Step 5: Solve for x
   x = 12,143.43/123.42
6. Step 6: Final answer
   x = 98.39