Finding the Fourth Proportional to 9,290.28, 12,819.25 and 5,513.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.28 : 12,819.25 = 5,513.61 : x
2. Step 2: Convert to fraction form
   9,290.28/12,819.25 = 5,513.61/x
3. Step 3: Cross multiply
   9,290.28x = 12,819.25 × 5,513.61
4. Step 4: Simplify right side
   9,290.28x = 70,680,344.99
5. Step 5: Solve for x
   x = 70,680,344.99/9,290.28
6. Step 6: Final answer
   x = 7,607.99