Finding the Fourth Proportional to 2,440.56, 3,659.16 and 1,287.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.56 : 3,659.16 = 1,287.12 : x
2. Step 2: Convert to fraction form
   2,440.56/3,659.16 = 1,287.12/x
3. Step 3: Cross multiply
   2,440.56x = 3,659.16 × 1,287.12
4. Step 4: Simplify right side
   2,440.56x = 4,709,778.02
5. Step 5: Solve for x
   x = 4,709,778.02/2,440.56
6. Step 6: Final answer
   x = 1,929.79