Finding the Fourth Proportional to 3,143.98, 4,711.50 and 2,315.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,143.98 : 4,711.50 = 2,315.74 : x
2. Step 2: Convert to fraction form
   3,143.98/4,711.50 = 2,315.74/x
3. Step 3: Cross multiply
   3,143.98x = 4,711.50 × 2,315.74
4. Step 4: Simplify right side
   3,143.98x = 10,910,609.01
5. Step 5: Solve for x
   x = 10,910,609.01/3,143.98
6. Step 6: Final answer
   x = 3,470.32