Finding the Fourth Proportional to 9,919.18, 13,689.33 and 5,443.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.18 : 13,689.33 = 5,443.81 : x
2. Step 2: Convert to fraction form
   9,919.18/13,689.33 = 5,443.81/x
3. Step 3: Cross multiply
   9,919.18x = 13,689.33 × 5,443.81
4. Step 4: Simplify right side
   9,919.18x = 74,522,072.22
5. Step 5: Solve for x
   x = 74,522,072.22/9,919.18
6. Step 6: Final answer
   x = 7,512.92