Finding the Fourth Proportional to 123.69, 185.48 and 42.51

Step by Step Solution

1. Step 1: Write the proportion equation
   123.69 : 185.48 = 42.51 : x
2. Step 2: Convert to fraction form
   123.69/185.48 = 42.51/x
3. Step 3: Cross multiply
   123.69x = 185.48 × 42.51
4. Step 4: Simplify right side
   123.69x = 7,884.75
5. Step 5: Solve for x
   x = 7,884.75/123.69
6. Step 6: Final answer
   x = 63.75