Finding the Fourth Proportional to 10,784.72, 16,155.48 and 9,871.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,784.72 : 16,155.48 = 9,871.04 : x
2. Step 2: Convert to fraction form
   10,784.72/16,155.48 = 9,871.04/x
3. Step 3: Cross multiply
   10,784.72x = 16,155.48 × 9,871.04
4. Step 4: Simplify right side
   10,784.72x = 159,471,389.30
5. Step 5: Solve for x
   x = 159,471,389.30/10,784.72
6. Step 6: Final answer
   x = 14,786.79