Finding the Fourth Proportional to 2,615.15, 3,609.59 and 1,619.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.15 : 3,609.59 = 1,619.86 : x
2. Step 2: Convert to fraction form
   2,615.15/3,609.59 = 1,619.86/x
3. Step 3: Cross multiply
   2,615.15x = 3,609.59 × 1,619.86
4. Step 4: Simplify right side
   2,615.15x = 5,847,013.33
5. Step 5: Solve for x
   x = 5,847,013.33/2,615.15
6. Step 6: Final answer
   x = 2,235.83