Finding the Fourth Proportional to 123.98, 186.00 and 42.82

Step by Step Solution

1. Step 1: Write the proportion equation
   123.98 : 186.00 = 42.82 : x
2. Step 2: Convert to fraction form
   123.98/186.00 = 42.82/x
3. Step 3: Cross multiply
   123.98x = 186.00 × 42.82
4. Step 4: Simplify right side
   123.98x = 7,965.44
5. Step 5: Solve for x
   x = 7,965.44/123.98
6. Step 6: Final answer
   x = 64.25