Finding the Fourth Proportional to 12,443.18, 18,667.94 and 3,678.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.18 : 18,667.94 = 3,678.10 : x
2. Step 2: Convert to fraction form
   12,443.18/18,667.94 = 3,678.10/x
3. Step 3: Cross multiply
   12,443.18x = 18,667.94 × 3,678.10
4. Step 4: Simplify right side
   12,443.18x = 68,662,485.05
5. Step 5: Solve for x
   x = 68,662,485.05/12,443.18
6. Step 6: Final answer
   x = 5,518.08