Finding the Fourth Proportional to 9,968.09, 13,755.90 and 5,491.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,968.09 : 13,755.90 = 5,491.74 : x
2. Step 2: Convert to fraction form
   9,968.09/13,755.90 = 5,491.74/x
3. Step 3: Cross multiply
   9,968.09x = 13,755.90 × 5,491.74
4. Step 4: Simplify right side
   9,968.09x = 75,543,826.27
5. Step 5: Solve for x
   x = 75,543,826.27/9,968.09
6. Step 6: Final answer
   x = 7,578.56