Finding the Fourth Proportional to 2,615.61, 3,609.57 and 1,436.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.61 : 3,609.57 = 1,436.65 : x
2. Step 2: Convert to fraction form
   2,615.61/3,609.57 = 1,436.65/x
3. Step 3: Cross multiply
   2,615.61x = 3,609.57 × 1,436.65
4. Step 4: Simplify right side
   2,615.61x = 5,185,688.74
5. Step 5: Solve for x
   x = 5,185,688.74/2,615.61
6. Step 6: Final answer
   x = 1,982.59