Finding the Fourth Proportional to 2,615.72, 3,609.87 and 1,436.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.72 : 3,609.87 = 1,436.81 : x
2. Step 2: Convert to fraction form
   2,615.72/3,609.87 = 1,436.81/x
3. Step 3: Cross multiply
   2,615.72x = 3,609.87 × 1,436.81
4. Step 4: Simplify right side
   2,615.72x = 5,186,684.65
5. Step 5: Solve for x
   x = 5,186,684.65/2,615.72
6. Step 6: Final answer
   x = 1,982.89