Finding the Fourth Proportional to 12,841.43, 17,709.32 and 9,857.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,841.43 : 17,709.32 = 9,857.39 : x
2. Step 2: Convert to fraction form
   12,841.43/17,709.32 = 9,857.39/x
3. Step 3: Cross multiply
   12,841.43x = 17,709.32 × 9,857.39
4. Step 4: Simplify right side
   12,841.43x = 174,567,624.59
5. Step 5: Solve for x
   x = 174,567,624.59/12,841.43
6. Step 6: Final answer
   x = 13,594.10