Finding the Fourth Proportional to 11,789.47, 16,267.35 and 8,653.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,789.47 : 16,267.35 = 8,653.15 : x
2. Step 2: Convert to fraction form
   11,789.47/16,267.35 = 8,653.15/x
3. Step 3: Cross multiply
   11,789.47x = 16,267.35 × 8,653.15
4. Step 4: Simplify right side
   11,789.47x = 140,763,819.65
5. Step 5: Solve for x
   x = 140,763,819.65/11,789.47
6. Step 6: Final answer
   x = 11,939.79