Finding the Fourth Proportional to 7,615.96, 10,513.20 and 5,519.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,615.96 : 10,513.20 = 5,519.68 : x
2. Step 2: Convert to fraction form
   7,615.96/10,513.20 = 5,519.68/x
3. Step 3: Cross multiply
   7,615.96x = 10,513.20 × 5,519.68
4. Step 4: Simplify right side
   7,615.96x = 58,029,499.78
5. Step 5: Solve for x
   x = 58,029,499.78/7,615.96
6. Step 6: Final answer
   x = 7,619.46