Finding the Fourth Proportional to 8,456.91, 12,613.86 and 7,969.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.91 : 12,613.86 = 7,969.08 : x
2. Step 2: Convert to fraction form
   8,456.91/12,613.86 = 7,969.08/x
3. Step 3: Cross multiply
   8,456.91x = 12,613.86 × 7,969.08
4. Step 4: Simplify right side
   8,456.91x = 100,520,859.45
5. Step 5: Solve for x
   x = 100,520,859.45/8,456.91
6. Step 6: Final answer
   x = 11,886.24