Finding the Fourth Proportional to 2,601.91, 3,900.48 and 957.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.91 : 3,900.48 = 957.21 : x
2. Step 2: Convert to fraction form
   2,601.91/3,900.48 = 957.21/x
3. Step 3: Cross multiply
   2,601.91x = 3,900.48 × 957.21
4. Step 4: Simplify right side
   2,601.91x = 3,733,578.46
5. Step 5: Solve for x
   x = 3,733,578.46/2,601.91
6. Step 6: Final answer
   x = 1,434.94