Finding the Fourth Proportional to 12,003, 16,565.81 and 8,656.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,003 : 16,565.81 = 8,656.89 : x
2. Step 2: Convert to fraction form
   12,003/16,565.81 = 8,656.89/x
3. Step 3: Cross multiply
   12,003x = 16,565.81 × 8,656.89
4. Step 4: Simplify right side
   12,003x = 143,408,394.93
5. Step 5: Solve for x
   x = 143,408,394.93/12,003
6. Step 6: Final answer
   x = 11,947.71