Finding the Fourth Proportional to 12,843.86, 17,717.43 and 10,456.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,843.86 : 17,717.43 = 10,456.40 : x
2. Step 2: Convert to fraction form
   12,843.86/17,717.43 = 10,456.40/x
3. Step 3: Cross multiply
   12,843.86x = 17,717.43 × 10,456.40
4. Step 4: Simplify right side
   12,843.86x = 185,260,535.05
5. Step 5: Solve for x
   x = 185,260,535.05/12,843.86
6. Step 6: Final answer
   x = 14,424.05