Finding the Fourth Proportional to 12,699.81, 17,514.88 and 7,662.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.81 : 17,514.88 = 7,662.96 : x
2. Step 2: Convert to fraction form
   12,699.81/17,514.88 = 7,662.96/x
3. Step 3: Cross multiply
   12,699.81x = 17,514.88 × 7,662.96
4. Step 4: Simplify right side
   12,699.81x = 134,215,805.69
5. Step 5: Solve for x
   x = 134,215,805.69/12,699.81
6. Step 6: Final answer
   x = 10,568.33