Finding the Fourth Proportional to 15,866.48, 21,895.25 and 9,155.83

Step by Step Solution

1. Step 1: Write the proportion equation
   15,866.48 : 21,895.25 = 9,155.83 : x
2. Step 2: Convert to fraction form
   15,866.48/21,895.25 = 9,155.83/x
3. Step 3: Cross multiply
   15,866.48x = 21,895.25 × 9,155.83
4. Step 4: Simplify right side
   15,866.48x = 200,469,141.03
5. Step 5: Solve for x
   x = 200,469,141.03/15,866.48
6. Step 6: Final answer
   x = 12,634.76