Finding the Fourth Proportional to 2,689.59, 4,031.96 and 957.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.59 : 4,031.96 = 957.81 : x
2. Step 2: Convert to fraction form
   2,689.59/4,031.96 = 957.81/x
3. Step 3: Cross multiply
   2,689.59x = 4,031.96 × 957.81
4. Step 4: Simplify right side
   2,689.59x = 3,861,846.82
5. Step 5: Solve for x
   x = 3,861,846.82/2,689.59
6. Step 6: Final answer
   x = 1,435.85