Finding the Fourth Proportional to 123,640.38, 185,458.56 and 39,399.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,640.38 : 185,458.56 = 39,399.42 : x
2. Step 2: Convert to fraction form
   123,640.38/185,458.56 = 39,399.42/x
3. Step 3: Cross multiply
   123,640.38x = 185,458.56 × 39,399.42
4. Step 4: Simplify right side
   123,640.38x = 7,306,959,698.04
5. Step 5: Solve for x
   x = 7,306,959,698.04/123,640.38
6. Step 6: Final answer
   x = 59,098.49