Finding the Fourth Proportional to 123.21, 184.82 and 42.02

Step by Step Solution

1. Step 1: Write the proportion equation
   123.21 : 184.82 = 42.02 : x
2. Step 2: Convert to fraction form
   123.21/184.82 = 42.02/x
3. Step 3: Cross multiply
   123.21x = 184.82 × 42.02
4. Step 4: Simplify right side
   123.21x = 7,765.00
5. Step 5: Solve for x
   x = 7,765.00/123.21
6. Step 6: Final answer
   x = 63.02