Finding the Fourth Proportional to 10,979.76, 16,469.78 and 3,081.83

Step by Step Solution

1. Step 1: Write the proportion equation
   10,979.76 : 16,469.78 = 3,081.83 : x
2. Step 2: Convert to fraction form
   10,979.76/16,469.78 = 3,081.83/x
3. Step 3: Cross multiply
   10,979.76x = 16,469.78 × 3,081.83
4. Step 4: Simplify right side
   10,979.76x = 50,756,964.34
5. Step 5: Solve for x
   x = 50,756,964.34/10,979.76
6. Step 6: Final answer
   x = 4,622.78