Finding the Fourth Proportional to 3,147.89, 4,721.72 and 1,067.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,147.89 : 4,721.72 = 1,067.87 : x
2. Step 2: Convert to fraction form
   3,147.89/4,721.72 = 1,067.87/x
3. Step 3: Cross multiply
   3,147.89x = 4,721.72 × 1,067.87
4. Step 4: Simplify right side
   3,147.89x = 5,042,154.19
5. Step 5: Solve for x
   x = 5,042,154.19/3,147.89
6. Step 6: Final answer
   x = 1,601.76