Finding the Fourth Proportional to 10,930.27, 16,395.51 and 3,139.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.27 : 16,395.51 = 3,139.09 : x
2. Step 2: Convert to fraction form
   10,930.27/16,395.51 = 3,139.09/x
3. Step 3: Cross multiply
   10,930.27x = 16,395.51 × 3,139.09
4. Step 4: Simplify right side
   10,930.27x = 51,466,981.49
5. Step 5: Solve for x
   x = 51,466,981.49/10,930.27
6. Step 6: Final answer
   x = 4,708.67