Finding the Fourth Proportional to 123.30, 184.86 and 42.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123.30 : 184.86 = 42.16 : x
2. Step 2: Convert to fraction form
   123.30/184.86 = 42.16/x
3. Step 3: Cross multiply
   123.30x = 184.86 × 42.16
4. Step 4: Simplify right side
   123.30x = 7,793.70
5. Step 5: Solve for x
   x = 7,793.70/123.30
6. Step 6: Final answer
   x = 63.21