Finding the Fourth Proportional to 10,930.46, 16,391.90 and 3,910.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.46 : 16,391.90 = 3,910.46 : x
2. Step 2: Convert to fraction form
   10,930.46/16,391.90 = 3,910.46/x
3. Step 3: Cross multiply
   10,930.46x = 16,391.90 × 3,910.46
4. Step 4: Simplify right side
   10,930.46x = 64,099,797.09
5. Step 5: Solve for x
   x = 64,099,797.09/10,930.46
6. Step 6: Final answer
   x = 5,864.33