Finding the Fourth Proportional to 9,968.49, 13,755.80 and 5,491.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,968.49 : 13,755.80 = 5,491.98 : x
2. Step 2: Convert to fraction form
   9,968.49/13,755.80 = 5,491.98/x
3. Step 3: Cross multiply
   9,968.49x = 13,755.80 × 5,491.98
4. Step 4: Simplify right side
   9,968.49x = 75,546,578.48
5. Step 5: Solve for x
   x = 75,546,578.48/9,968.49
6. Step 6: Final answer
   x = 7,578.54