Finding the Fourth Proportional to 12,886.43, 17,783.71 and 12,295.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,886.43 : 17,783.71 = 12,295.94 : x
2. Step 2: Convert to fraction form
   12,886.43/17,783.71 = 12,295.94/x
3. Step 3: Cross multiply
   12,886.43x = 17,783.71 × 12,295.94
4. Step 4: Simplify right side
   12,886.43x = 218,667,431.14
5. Step 5: Solve for x
   x = 218,667,431.14/12,886.43
6. Step 6: Final answer
   x = 16,968.81