Finding the Fourth Proportional to 9,967.63, 13,755.50 and 5,491.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,967.63 : 13,755.50 = 5,491.35 : x
2. Step 2: Convert to fraction form
   9,967.63/13,755.50 = 5,491.35/x
3. Step 3: Cross multiply
   9,967.63x = 13,755.50 × 5,491.35
4. Step 4: Simplify right side
   9,967.63x = 75,536,288.95
5. Step 5: Solve for x
   x = 75,536,288.95/9,967.63
6. Step 6: Final answer
   x = 7,578.16