Finding the Fourth Proportional to 10,872.78, 16,308.77 and 3,081.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,872.78 : 16,308.77 = 3,081.39 : x
2. Step 2: Convert to fraction form
   10,872.78/16,308.77 = 3,081.39/x
3. Step 3: Cross multiply
   10,872.78x = 16,308.77 × 3,081.39
4. Step 4: Simplify right side
   10,872.78x = 50,253,665.38
5. Step 5: Solve for x
   x = 50,253,665.38/10,872.78
6. Step 6: Final answer
   x = 4,621.97