Finding the Fourth Proportional to 8,124.85, 12,185.54 and 2,578.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,124.85 : 12,185.54 = 2,578.69 : x
2. Step 2: Convert to fraction form
   8,124.85/12,185.54 = 2,578.69/x
3. Step 3: Cross multiply
   8,124.85x = 12,185.54 × 2,578.69
4. Step 4: Simplify right side
   8,124.85x = 31,422,656.32
5. Step 5: Solve for x
   x = 31,422,656.32/8,124.85
6. Step 6: Final answer
   x = 3,867.48