Finding the Fourth Proportional to 1,645.94, 2,474.58 and 1,323.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.94 : 2,474.58 = 1,323.56 : x
2. Step 2: Convert to fraction form
   1,645.94/2,474.58 = 1,323.56/x
3. Step 3: Cross multiply
   1,645.94x = 2,474.58 × 1,323.56
4. Step 4: Simplify right side
   1,645.94x = 3,275,255.10
5. Step 5: Solve for x
   x = 3,275,255.10/1,645.94
6. Step 6: Final answer
   x = 1,989.90