Finding the Fourth Proportional to 2,615.16, 3,608.88 and 1,436.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.16 : 3,608.88 = 1,436.20 : x
2. Step 2: Convert to fraction form
   2,615.16/3,608.88 = 1,436.20/x
3. Step 3: Cross multiply
   2,615.16x = 3,608.88 × 1,436.20
4. Step 4: Simplify right side
   2,615.16x = 5,183,073.46
5. Step 5: Solve for x
   x = 5,183,073.46/2,615.16
6. Step 6: Final answer
   x = 1,981.93