Finding the Fourth Proportional to 9,920.04, 13,689.77 and 5,443.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.04 : 13,689.77 = 5,443.67 : x
2. Step 2: Convert to fraction form
   9,920.04/13,689.77 = 5,443.67/x
3. Step 3: Cross multiply
   9,920.04x = 13,689.77 × 5,443.67
4. Step 4: Simplify right side
   9,920.04x = 74,522,494.59
5. Step 5: Solve for x
   x = 74,522,494.59/9,920.04
6. Step 6: Final answer
   x = 7,512.32