Finding the Fourth Proportional to 9,967.72, 13,755.39 and 5,491.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,967.72 : 13,755.39 = 5,491.37 : x
2. Step 2: Convert to fraction form
   9,967.72/13,755.39 = 5,491.37/x
3. Step 3: Cross multiply
   9,967.72x = 13,755.39 × 5,491.37
4. Step 4: Simplify right side
   9,967.72x = 75,535,846.61
5. Step 5: Solve for x
   x = 75,535,846.61/9,967.72
6. Step 6: Final answer
   x = 7,578.05