Finding the Fourth Proportional to 2,405.58, 3,320.31 and 1,608.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.58 : 3,320.31 = 1,608.99 : x
2. Step 2: Convert to fraction form
   2,405.58/3,320.31 = 1,608.99/x
3. Step 3: Cross multiply
   2,405.58x = 3,320.31 × 1,608.99
4. Step 4: Simplify right side
   2,405.58x = 5,342,345.59
5. Step 5: Solve for x
   x = 5,342,345.59/2,405.58
6. Step 6: Final answer
   x = 2,220.81