Finding the Fourth Proportional to 12,209.59, 16,843.91 and 7,164.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.59 : 16,843.91 = 7,164.91 : x
2. Step 2: Convert to fraction form
   12,209.59/16,843.91 = 7,164.91/x
3. Step 3: Cross multiply
   12,209.59x = 16,843.91 × 7,164.91
4. Step 4: Simplify right side
   12,209.59x = 120,685,063.37
5. Step 5: Solve for x
   x = 120,685,063.37/12,209.59
6. Step 6: Final answer
   x = 9,884.45