Finding the Fourth Proportional to 123.98, 185.91 and 42.83

Step by Step Solution

1. Step 1: Write the proportion equation
   123.98 : 185.91 = 42.83 : x
2. Step 2: Convert to fraction form
   123.98/185.91 = 42.83/x
3. Step 3: Cross multiply
   123.98x = 185.91 × 42.83
4. Step 4: Simplify right side
   123.98x = 7,961.60
5. Step 5: Solve for x
   x = 7,961.60/123.98
6. Step 6: Final answer
   x = 64.22