Finding the Fourth Proportional to 10,928.52, 16,399.68 and 4,355.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.52 : 16,399.68 = 4,355.40 : x
2. Step 2: Convert to fraction form
   10,928.52/16,399.68 = 4,355.40/x
3. Step 3: Cross multiply
   10,928.52x = 16,399.68 × 4,355.40
4. Step 4: Simplify right side
   10,928.52x = 71,427,166.27
5. Step 5: Solve for x
   x = 71,427,166.27/10,928.52
6. Step 6: Final answer
   x = 6,535.85