Finding the Fourth Proportional to 123.54, 185.30 and 42.36

Step by Step Solution

1. Step 1: Write the proportion equation
   123.54 : 185.30 = 42.36 : x
2. Step 2: Convert to fraction form
   123.54/185.30 = 42.36/x
3. Step 3: Cross multiply
   123.54x = 185.30 × 42.36
4. Step 4: Simplify right side
   123.54x = 7,849.10
5. Step 5: Solve for x
   x = 7,849.10/123.54
6. Step 6: Final answer
   x = 63.53