Finding the Fourth Proportional to 9,918.43, 13,687.81 and 5,442.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.43 : 13,687.81 = 5,442.37 : x
2. Step 2: Convert to fraction form
   9,918.43/13,687.81 = 5,442.37/x
3. Step 3: Cross multiply
   9,918.43x = 13,687.81 × 5,442.37
4. Step 4: Simplify right side
   9,918.43x = 74,494,078.68
5. Step 5: Solve for x
   x = 74,494,078.68/9,918.43
6. Step 6: Final answer
   x = 7,510.67