Finding the Fourth Proportional to 9,288.36, 12,819.70 and 5,513.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.36 : 12,819.70 = 5,513.62 : x
2. Step 2: Convert to fraction form
   9,288.36/12,819.70 = 5,513.62/x
3. Step 3: Cross multiply
   9,288.36x = 12,819.70 × 5,513.62
4. Step 4: Simplify right side
   9,288.36x = 70,682,954.31
5. Step 5: Solve for x
   x = 70,682,954.31/9,288.36
6. Step 6: Final answer
   x = 7,609.84