Finding the Fourth Proportional to 123.43, 185.17 and 42.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123.43 : 185.17 = 42.25 : x
2. Step 2: Convert to fraction form
   123.43/185.17 = 42.25/x
3. Step 3: Cross multiply
   123.43x = 185.17 × 42.25
4. Step 4: Simplify right side
   123.43x = 7,822.86
5. Step 5: Solve for x
   x = 7,822.86/123.43
6. Step 6: Final answer
   x = 63.38