Finding the Fourth Proportional to 10,928.99, 16,389.32 and 3,907.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.99 : 16,389.32 = 3,907.71 : x
2. Step 2: Convert to fraction form
   10,928.99/16,389.32 = 3,907.71/x
3. Step 3: Cross multiply
   10,928.99x = 16,389.32 × 3,907.71
4. Step 4: Simplify right side
   10,928.99x = 64,044,690.12
5. Step 5: Solve for x
   x = 64,044,690.12/10,928.99
6. Step 6: Final answer
   x = 5,860.08