Finding the Fourth Proportional to 3,131.71, 4,321.72 and 1,715.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.71 : 4,321.72 = 1,715.43 : x
2. Step 2: Convert to fraction form
   3,131.71/4,321.72 = 1,715.43/x
3. Step 3: Cross multiply
   3,131.71x = 4,321.72 × 1,715.43
4. Step 4: Simplify right side
   3,131.71x = 7,413,597.29
5. Step 5: Solve for x
   x = 7,413,597.29/3,131.71
6. Step 6: Final answer
   x = 2,367.27