Finding the Fourth Proportional to 10,789.56, 16,156.78 and 8,601.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,789.56 : 16,156.78 = 8,601.48 : x
2. Step 2: Convert to fraction form
   10,789.56/16,156.78 = 8,601.48/x
3. Step 3: Cross multiply
   10,789.56x = 16,156.78 × 8,601.48
4. Step 4: Simplify right side
   10,789.56x = 138,972,220.03
5. Step 5: Solve for x
   x = 138,972,220.03/10,789.56
6. Step 6: Final answer
   x = 12,880.25