Finding the Fourth Proportional to 2,439.69, 3,653.37 and 1,615.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.69 : 3,653.37 = 1,615.47 : x
2. Step 2: Convert to fraction form
   2,439.69/3,653.37 = 1,615.47/x
3. Step 3: Cross multiply
   2,439.69x = 3,653.37 × 1,615.47
4. Step 4: Simplify right side
   2,439.69x = 5,901,909.63
5. Step 5: Solve for x
   x = 5,901,909.63/2,439.69
6. Step 6: Final answer
   x = 2,419.12