Finding the Fourth Proportional to 12,209.34, 16,843.56 and 7,164.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.34 : 16,843.56 = 7,164.66 : x
2. Step 2: Convert to fraction form
   12,209.34/16,843.56 = 7,164.66/x
3. Step 3: Cross multiply
   12,209.34x = 16,843.56 × 7,164.66
4. Step 4: Simplify right side
   12,209.34x = 120,678,380.59
5. Step 5: Solve for x
   x = 120,678,380.59/12,209.34
6. Step 6: Final answer
   x = 9,884.10