Finding the Fourth Proportional to 10,631.92, 14,673.18 and 8,109.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,631.92 : 14,673.18 = 8,109.40 : x
2. Step 2: Convert to fraction form
   10,631.92/14,673.18 = 8,109.40/x
3. Step 3: Cross multiply
   10,631.92x = 14,673.18 × 8,109.40
4. Step 4: Simplify right side
   10,631.92x = 118,990,685.89
5. Step 5: Solve for x
   x = 118,990,685.89/10,631.92
6. Step 6: Final answer
   x = 11,191.83