Finding the Fourth Proportional to 10,280.69, 15,415.46 and 3,615.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,280.69 : 15,415.46 = 3,615.47 : x
2. Step 2: Convert to fraction form
   10,280.69/15,415.46 = 3,615.47/x
3. Step 3: Cross multiply
   10,280.69x = 15,415.46 × 3,615.47
4. Step 4: Simplify right side
   10,280.69x = 55,734,038.01
5. Step 5: Solve for x
   x = 55,734,038.01/10,280.69
6. Step 6: Final answer
   x = 5,421.24