Finding the Fourth Proportional to 9,919.38, 13,688.73 and 5,443.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.38 : 13,688.73 = 5,443.41 : x
2. Step 2: Convert to fraction form
   9,919.38/13,688.73 = 5,443.41/x
3. Step 3: Cross multiply
   9,919.38x = 13,688.73 × 5,443.41
4. Step 4: Simplify right side
   9,919.38x = 74,513,344.10
5. Step 5: Solve for x
   x = 74,513,344.10/9,919.38
6. Step 6: Final answer
   x = 7,511.90