Finding the Fourth Proportional to 10,930.48, 16,391.70 and 3,908.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.48 : 16,391.70 = 3,908.59 : x
2. Step 2: Convert to fraction form
   10,930.48/16,391.70 = 3,908.59/x
3. Step 3: Cross multiply
   10,930.48x = 16,391.70 × 3,908.59
4. Step 4: Simplify right side
   10,930.48x = 64,068,434.70
5. Step 5: Solve for x
   x = 64,068,434.70/10,930.48
6. Step 6: Final answer
   x = 5,861.45