Finding the Fourth Proportional to 9,686.69, 14,510.31 and 8,879.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,686.69 : 14,510.31 = 8,879.38 : x
2. Step 2: Convert to fraction form
   9,686.69/14,510.31 = 8,879.38/x
3. Step 3: Cross multiply
   9,686.69x = 14,510.31 × 8,879.38
4. Step 4: Simplify right side
   9,686.69x = 128,842,556.41
5. Step 5: Solve for x
   x = 128,842,556.41/9,686.69
6. Step 6: Final answer
   x = 13,300.99