Finding the Fourth Proportional to 10,763.85, 16,128.72 and 8,304.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,763.85 : 16,128.72 = 8,304.69 : x
2. Step 2: Convert to fraction form
   10,763.85/16,128.72 = 8,304.69/x
3. Step 3: Cross multiply
   10,763.85x = 16,128.72 × 8,304.69
4. Step 4: Simplify right side
   10,763.85x = 133,944,019.70
5. Step 5: Solve for x
   x = 133,944,019.70/10,763.85
6. Step 6: Final answer
   x = 12,443.88