Finding the Fourth Proportional to 8,404.86, 12,604.56 and 2,858.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.86 : 12,604.56 = 2,858.09 : x
2. Step 2: Convert to fraction form
   8,404.86/12,604.56 = 2,858.09/x
3. Step 3: Cross multiply
   8,404.86x = 12,604.56 × 2,858.09
4. Step 4: Simplify right side
   8,404.86x = 36,024,909.23
5. Step 5: Solve for x
   x = 36,024,909.23/8,404.86
6. Step 6: Final answer
   x = 4,286.20