Finding the Fourth Proportional to 8,411.90, 12,616.41 and 2,788.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.90 : 12,616.41 = 2,788.88 : x
2. Step 2: Convert to fraction form
   8,411.90/12,616.41 = 2,788.88/x
3. Step 3: Cross multiply
   8,411.90x = 12,616.41 × 2,788.88
4. Step 4: Simplify right side
   8,411.90x = 35,185,653.52
5. Step 5: Solve for x
   x = 35,185,653.52/8,411.90
6. Step 6: Final answer
   x = 4,182.84