Finding the Fourth Proportional to 12,859.72, 19,292.55 and 3,974.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,859.72 : 19,292.55 = 3,974.71 : x
2. Step 2: Convert to fraction form
   12,859.72/19,292.55 = 3,974.71/x
3. Step 3: Cross multiply
   12,859.72x = 19,292.55 × 3,974.71
4. Step 4: Simplify right side
   12,859.72x = 76,682,291.41
5. Step 5: Solve for x
   x = 76,682,291.41/12,859.72
6. Step 6: Final answer
   x = 5,962.98