Finding the Fourth Proportional to 10,928.04, 16,388.04 and 3,906.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.04 : 16,388.04 = 3,906.16 : x
2. Step 2: Convert to fraction form
   10,928.04/16,388.04 = 3,906.16/x
3. Step 3: Cross multiply
   10,928.04x = 16,388.04 × 3,906.16
4. Step 4: Simplify right side
   10,928.04x = 64,014,224.39
5. Step 5: Solve for x
   x = 64,014,224.39/10,928.04
6. Step 6: Final answer
   x = 5,857.80