Finding the Fourth Proportional to 12,410.41, 18,616.98 and 5,385.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,410.41 : 18,616.98 = 5,385.60 : x
2. Step 2: Convert to fraction form
   12,410.41/18,616.98 = 5,385.60/x
3. Step 3: Cross multiply
   12,410.41x = 18,616.98 × 5,385.60
4. Step 4: Simplify right side
   12,410.41x = 100,263,500.94
5. Step 5: Solve for x
   x = 100,263,500.94/12,410.41
6. Step 6: Final answer
   x = 8,078.98