Finding the Fourth Proportional to 1,385.57, 1,912.32 and 1,323.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.57 : 1,912.32 = 1,323.29 : x
2. Step 2: Convert to fraction form
   1,385.57/1,912.32 = 1,323.29/x
3. Step 3: Cross multiply
   1,385.57x = 1,912.32 × 1,323.29
4. Step 4: Simplify right side
   1,385.57x = 2,530,540.65
5. Step 5: Solve for x
   x = 2,530,540.65/1,385.57
6. Step 6: Final answer
   x = 1,826.36