Finding the Fourth Proportional to 12,243.30, 18,355.98 and 3,918.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,243.30 : 18,355.98 = 3,918.54 : x
2. Step 2: Convert to fraction form
   12,243.30/18,355.98 = 3,918.54/x
3. Step 3: Cross multiply
   12,243.30x = 18,355.98 × 3,918.54
4. Step 4: Simplify right side
   12,243.30x = 71,928,641.87
5. Step 5: Solve for x
   x = 71,928,641.87/12,243.30
6. Step 6: Final answer
   x = 5,874.94