Finding the Fourth Proportional to 10,786.56, 14,868.54 and 9,882.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.56 : 14,868.54 = 9,882.60 : x
2. Step 2: Convert to fraction form
   10,786.56/14,868.54 = 9,882.60/x
3. Step 3: Cross multiply
   10,786.56x = 14,868.54 × 9,882.60
4. Step 4: Simplify right side
   10,786.56x = 146,939,833.40
5. Step 5: Solve for x
   x = 146,939,833.40/10,786.56
6. Step 6: Final answer
   x = 13,622.49