Finding the Fourth Proportional to 2,143.72, 2,956.16 and 1,303.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.72 : 2,956.16 = 1,303.61 : x
2. Step 2: Convert to fraction form
   2,143.72/2,956.16 = 1,303.61/x
3. Step 3: Cross multiply
   2,143.72x = 2,956.16 × 1,303.61
4. Step 4: Simplify right side
   2,143.72x = 3,853,668.22
5. Step 5: Solve for x
   x = 3,853,668.22/2,143.72
6. Step 6: Final answer
   x = 1,797.65