Finding the Fourth Proportional to 123.42, 185.18 and 65.64

Step by Step Solution

1. Step 1: Write the proportion equation
   123.42 : 185.18 = 65.64 : x
2. Step 2: Convert to fraction form
   123.42/185.18 = 65.64/x
3. Step 3: Cross multiply
   123.42x = 185.18 × 65.64
4. Step 4: Simplify right side
   123.42x = 12,155.58
5. Step 5: Solve for x
   x = 12,155.58/123.42
6. Step 6: Final answer
   x = 98.49