Finding the Fourth Proportional to 10,835.10, 16,289.10 and 9,231.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,835.10 : 16,289.10 = 9,231.30 : x
2. Step 2: Convert to fraction form
   10,835.10/16,289.10 = 9,231.30/x
3. Step 3: Cross multiply
   10,835.10x = 16,289.10 × 9,231.30
4. Step 4: Simplify right side
   10,835.10x = 150,369,568.83
5. Step 5: Solve for x
   x = 150,369,568.83/10,835.10
6. Step 6: Final answer
   x = 13,878.00