Finding the Fourth Proportional to 2,385.45, 3,291.86 and 1,323.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.45 : 3,291.86 = 1,323.20 : x
2. Step 2: Convert to fraction form
   2,385.45/3,291.86 = 1,323.20/x
3. Step 3: Cross multiply
   2,385.45x = 3,291.86 × 1,323.20
4. Step 4: Simplify right side
   2,385.45x = 4,355,772.69
5. Step 5: Solve for x
   x = 4,355,772.69/2,385.45
6. Step 6: Final answer
   x = 1,825.98