Finding the Fourth Proportional to 8,404.86, 12,603.64 and 2,856.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.86 : 12,603.64 = 2,856.71 : x
2. Step 2: Convert to fraction form
   8,404.86/12,603.64 = 2,856.71/x
3. Step 3: Cross multiply
   8,404.86x = 12,603.64 × 2,856.71
4. Step 4: Simplify right side
   8,404.86x = 36,004,979.50
5. Step 5: Solve for x
   x = 36,004,979.50/8,404.86
6. Step 6: Final answer
   x = 4,283.83