Finding the Fourth Proportional to 123.67, 185.51 and 42.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123.67 : 185.51 = 42.49 : x
2. Step 2: Convert to fraction form
   123.67/185.51 = 42.49/x
3. Step 3: Cross multiply
   123.67x = 185.51 × 42.49
4. Step 4: Simplify right side
   123.67x = 7,882.32
5. Step 5: Solve for x
   x = 7,882.32/123.67
6. Step 6: Final answer
   x = 63.74