Finding the Fourth Proportional to 13,288.82, 19,936.04 and 3,928.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,288.82 : 19,936.04 = 3,928.10 : x
2. Step 2: Convert to fraction form
   13,288.82/19,936.04 = 3,928.10/x
3. Step 3: Cross multiply
   13,288.82x = 19,936.04 × 3,928.10
4. Step 4: Simplify right side
   13,288.82x = 78,310,639.40
5. Step 5: Solve for x
   x = 78,310,639.40/13,288.82
6. Step 6: Final answer
   x = 5,892.97