Finding the Fourth Proportional to 123.37, 185.04 and 42.21

Step by Step Solution

1. Step 1: Write the proportion equation
   123.37 : 185.04 = 42.21 : x
2. Step 2: Convert to fraction form
   123.37/185.04 = 42.21/x
3. Step 3: Cross multiply
   123.37x = 185.04 × 42.21
4. Step 4: Simplify right side
   123.37x = 7,810.54
5. Step 5: Solve for x
   x = 7,810.54/123.37
6. Step 6: Final answer
   x = 63.31