Finding the Fourth Proportional to 2,615.63, 3,609.60 and 1,436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.63 : 3,609.60 = 1,436.72 : x
2. Step 2: Convert to fraction form
   2,615.63/3,609.60 = 1,436.72/x
3. Step 3: Cross multiply
   2,615.63x = 3,609.60 × 1,436.72
4. Step 4: Simplify right side
   2,615.63x = 5,185,966.46
5. Step 5: Solve for x
   x = 5,185,966.46/2,615.63
6. Step 6: Final answer
   x = 1,982.68