Finding the Fourth Proportional to 10,929.87, 16,395.75 and 3,909.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,929.87 : 16,395.75 = 3,909.15 : x
2. Step 2: Convert to fraction form
   10,929.87/16,395.75 = 3,909.15/x
3. Step 3: Cross multiply
   10,929.87x = 16,395.75 × 3,909.15
4. Step 4: Simplify right side
   10,929.87x = 64,093,446.11
5. Step 5: Solve for x
   x = 64,093,446.11/10,929.87
6. Step 6: Final answer
   x = 5,864.06