Finding the Fourth Proportional to 5,519.52, 7,614.69 and 3,128.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,519.52 : 7,614.69 = 3,128.98 : x
2. Step 2: Convert to fraction form
   5,519.52/7,614.69 = 3,128.98/x
3. Step 3: Cross multiply
   5,519.52x = 7,614.69 × 3,128.98
4. Step 4: Simplify right side
   5,519.52x = 23,826,233.58
5. Step 5: Solve for x
   x = 23,826,233.58/5,519.52
6. Step 6: Final answer
   x = 4,316.72