Finding the Fourth Proportional to 8,404.94, 12,607.42 and 2,858.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.94 : 12,607.42 = 2,858.88 : x
2. Step 2: Convert to fraction form
   8,404.94/12,607.42 = 2,858.88/x
3. Step 3: Cross multiply
   8,404.94x = 12,607.42 × 2,858.88
4. Step 4: Simplify right side
   8,404.94x = 36,043,100.89
5. Step 5: Solve for x
   x = 36,043,100.89/8,404.94
6. Step 6: Final answer
   x = 4,288.32