Finding the Fourth Proportional to 12,895.56, 17,803.64 and 8,426.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,895.56 : 17,803.64 = 8,426.79 : x
2. Step 2: Convert to fraction form
   12,895.56/17,803.64 = 8,426.79/x
3. Step 3: Cross multiply
   12,895.56x = 17,803.64 × 8,426.79
4. Step 4: Simplify right side
   12,895.56x = 150,027,493.38
5. Step 5: Solve for x
   x = 150,027,493.38/12,895.56
6. Step 6: Final answer
   x = 11,634.04