Finding the Fourth Proportional to 12,805.45, 17,665.24 and 8,557.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,805.45 : 17,665.24 = 8,557.56 : x
2. Step 2: Convert to fraction form
   12,805.45/17,665.24 = 8,557.56/x
3. Step 3: Cross multiply
   12,805.45x = 17,665.24 × 8,557.56
4. Step 4: Simplify right side
   12,805.45x = 151,171,262.89
5. Step 5: Solve for x
   x = 151,171,262.89/12,805.45
6. Step 6: Final answer
   x = 11,805.23