Finding the Fourth Proportional to 123.45, 185.23 and 42.35

Step by Step Solution

1. Step 1: Write the proportion equation
   123.45 : 185.23 = 42.35 : x
2. Step 2: Convert to fraction form
   123.45/185.23 = 42.35/x
3. Step 3: Cross multiply
   123.45x = 185.23 × 42.35
4. Step 4: Simplify right side
   123.45x = 7,844.49
5. Step 5: Solve for x
   x = 7,844.49/123.45
6. Step 6: Final answer
   x = 63.54