Finding the Fourth Proportional to 9,967.95, 13,755.45 and 5,491.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,967.95 : 13,755.45 = 5,491.69 : x
2. Step 2: Convert to fraction form
   9,967.95/13,755.45 = 5,491.69/x
3. Step 3: Cross multiply
   9,967.95x = 13,755.45 × 5,491.69
4. Step 4: Simplify right side
   9,967.95x = 75,540,667.21
5. Step 5: Solve for x
   x = 75,540,667.21/9,967.95
6. Step 6: Final answer
   x = 7,578.36