Finding the Fourth Proportional to 10,789.56, 14,872.68 and 9,885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,789.56 : 14,872.68 = 9,885.60 : x
2. Step 2: Convert to fraction form
   10,789.56/14,872.68 = 9,885.60/x
3. Step 3: Cross multiply
   10,789.56x = 14,872.68 × 9,885.60
4. Step 4: Simplify right side
   10,789.56x = 147,025,365.41
5. Step 5: Solve for x
   x = 147,025,365.41/10,789.56
6. Step 6: Final answer
   x = 13,626.63