Finding the Fourth Proportional to 3,147.59, 4,721.50 and 956.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,147.59 : 4,721.50 = 956.31 : x
2. Step 2: Convert to fraction form
   3,147.59/4,721.50 = 956.31/x
3. Step 3: Cross multiply
   3,147.59x = 4,721.50 × 956.31
4. Step 4: Simplify right side
   3,147.59x = 4,515,224.69
5. Step 5: Solve for x
   x = 4,515,224.69/3,147.59
6. Step 6: Final answer
   x = 1,434.50