Finding the Fourth Proportional to 9,336.98, 12,897.62 and 8,672.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,336.98 : 12,897.62 = 8,672.68 : x
2. Step 2: Convert to fraction form
   9,336.98/12,897.62 = 8,672.68/x
3. Step 3: Cross multiply
   9,336.98x = 12,897.62 × 8,672.68
4. Step 4: Simplify right side
   9,336.98x = 111,856,936.30
5. Step 5: Solve for x
   x = 111,856,936.30/9,336.98
6. Step 6: Final answer
   x = 11,979.99