Finding the Fourth Proportional to 8,940.18, 13,411.86 and 3,678.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,940.18 : 13,411.86 = 3,678.09 : x
2. Step 2: Convert to fraction form
   8,940.18/13,411.86 = 3,678.09/x
3. Step 3: Cross multiply
   8,940.18x = 13,411.86 × 3,678.09
4. Step 4: Simplify right side
   8,940.18x = 49,330,028.15
5. Step 5: Solve for x
   x = 49,330,028.15/8,940.18
6. Step 6: Final answer
   x = 5,517.79