Finding the Fourth Proportional to 1,853.37, 2,558.15 and 1,145.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,853.37 : 2,558.15 = 1,145.33 : x
2. Step 2: Convert to fraction form
   1,853.37/2,558.15 = 1,145.33/x
3. Step 3: Cross multiply
   1,853.37x = 2,558.15 × 1,145.33
4. Step 4: Simplify right side
   1,853.37x = 2,929,907.42
5. Step 5: Solve for x
   x = 2,929,907.42/1,853.37
6. Step 6: Final answer
   x = 1,580.85