Finding the Fourth Proportional to 12,435, 18,659.82 and 5,509.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435 : 18,659.82 = 5,509.56 : x
2. Step 2: Convert to fraction form
   12,435/18,659.82 = 5,509.56/x
3. Step 3: Cross multiply
   12,435x = 18,659.82 × 5,509.56
4. Step 4: Simplify right side
   12,435x = 102,807,397.88
5. Step 5: Solve for x
   x = 102,807,397.88/12,435
6. Step 6: Final answer
   x = 8,267.58