Finding the Fourth Proportional to 9,920.07, 13,690.06 and 5,443.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.07 : 13,690.06 = 5,443.96 : x
2. Step 2: Convert to fraction form
   9,920.07/13,690.06 = 5,443.96/x
3. Step 3: Cross multiply
   9,920.07x = 13,690.06 × 5,443.96
4. Step 4: Simplify right side
   9,920.07x = 74,528,147.49
5. Step 5: Solve for x
   x = 74,528,147.49/9,920.07
6. Step 6: Final answer
   x = 7,512.87