Finding the Fourth Proportional to 9,517.72, 13,097.52 and 8,779

Step by Step Solution

1. Step 1: Write the proportion equation
   9,517.72 : 13,097.52 = 8,779 : x
2. Step 2: Convert to fraction form
   9,517.72/13,097.52 = 8,779/x
3. Step 3: Cross multiply
   9,517.72x = 13,097.52 × 8,779
4. Step 4: Simplify right side
   9,517.72x = 114,983,128.08
5. Step 5: Solve for x
   x = 114,983,128.08/9,517.72
6. Step 6: Final answer
   x = 12,080.95