Finding the Fourth Proportional to 10,880.99, 16,271.67 and 8,109.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,880.99 : 16,271.67 = 8,109.59 : x
2. Step 2: Convert to fraction form
   10,880.99/16,271.67 = 8,109.59/x
3. Step 3: Cross multiply
   10,880.99x = 16,271.67 × 8,109.59
4. Step 4: Simplify right side
   10,880.99x = 131,956,572.32
5. Step 5: Solve for x
   x = 131,956,572.32/10,880.99
6. Step 6: Final answer
   x = 12,127.26