Finding the Fourth Proportional to 2,615.64, 3,609.66 and 1,436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.64 : 3,609.66 = 1,436.72 : x
2. Step 2: Convert to fraction form
   2,615.64/3,609.66 = 1,436.72/x
3. Step 3: Cross multiply
   2,615.64x = 3,609.66 × 1,436.72
4. Step 4: Simplify right side
   2,615.64x = 5,186,070.72
5. Step 5: Solve for x
   x = 5,186,070.72/2,615.64
6. Step 6: Final answer
   x = 1,982.72