Finding the Fourth Proportional to 2,407.99, 3,321.59 and 1,661.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.99 : 3,321.59 = 1,661.91 : x
2. Step 2: Convert to fraction form
   2,407.99/3,321.59 = 1,661.91/x
3. Step 3: Cross multiply
   2,407.99x = 3,321.59 × 1,661.91
4. Step 4: Simplify right side
   2,407.99x = 5,520,183.64
5. Step 5: Solve for x
   x = 5,520,183.64/2,407.99
6. Step 6: Final answer
   x = 2,292.44