Finding the Fourth Proportional to 2,555.31, 3,835.23 and 1,323.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.31 : 3,835.23 = 1,323.60 : x
2. Step 2: Convert to fraction form
   2,555.31/3,835.23 = 1,323.60/x
3. Step 3: Cross multiply
   2,555.31x = 3,835.23 × 1,323.60
4. Step 4: Simplify right side
   2,555.31x = 5,076,310.43
5. Step 5: Solve for x
   x = 5,076,310.43/2,555.31
6. Step 6: Final answer
   x = 1,986.57