Finding the Fourth Proportional to 2,577.57, 3,556.75 and 1,443.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.57 : 3,556.75 = 1,443.31 : x
2. Step 2: Convert to fraction form
   2,577.57/3,556.75 = 1,443.31/x
3. Step 3: Cross multiply
   2,577.57x = 3,556.75 × 1,443.31
4. Step 4: Simplify right side
   2,577.57x = 5,133,480.34
5. Step 5: Solve for x
   x = 5,133,480.34/2,577.57
6. Step 6: Final answer
   x = 1,991.60