Finding the Fourth Proportional to 9,967.92, 13,755.18 and 5,490.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,967.92 : 13,755.18 = 5,490.80 : x
2. Step 2: Convert to fraction form
   9,967.92/13,755.18 = 5,490.80/x
3. Step 3: Cross multiply
   9,967.92x = 13,755.18 × 5,490.80
4. Step 4: Simplify right side
   9,967.92x = 75,526,873.57
5. Step 5: Solve for x
   x = 75,526,873.57/9,967.92
6. Step 6: Final answer
   x = 7,576.99