Finding the Fourth Proportional to 2,615.74, 3,609.73 and 1,436.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.74 : 3,609.73 = 1,436.78 : x
2. Step 2: Convert to fraction form
   2,615.74/3,609.73 = 1,436.78/x
3. Step 3: Cross multiply
   2,615.74x = 3,609.73 × 1,436.78
4. Step 4: Simplify right side
   2,615.74x = 5,186,387.87
5. Step 5: Solve for x
   x = 5,186,387.87/2,615.74
6. Step 6: Final answer
   x = 1,982.76