Finding the Fourth Proportional to 1,385.69, 1,912.49 and 1,323.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.69 : 1,912.49 = 1,323.41 : x
2. Step 2: Convert to fraction form
   1,385.69/1,912.49 = 1,323.41/x
3. Step 3: Cross multiply
   1,385.69x = 1,912.49 × 1,323.41
4. Step 4: Simplify right side
   1,385.69x = 2,531,008.39
5. Step 5: Solve for x
   x = 2,531,008.39/1,385.69
6. Step 6: Final answer
   x = 1,826.53