Finding the Fourth Proportional to 9,628.12, 13,284.42 and 5,436.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,628.12 : 13,284.42 = 5,436.28 : x
2. Step 2: Convert to fraction form
   9,628.12/13,284.42 = 5,436.28/x
3. Step 3: Cross multiply
   9,628.12x = 13,284.42 × 5,436.28
4. Step 4: Simplify right side
   9,628.12x = 72,217,826.76
5. Step 5: Solve for x
   x = 72,217,826.76/9,628.12
6. Step 6: Final answer
   x = 7,500.72