Finding the Fourth Proportional to 2,488.21, 3,433.53 and 1,440.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.21 : 3,433.53 = 1,440.34 : x
2. Step 2: Convert to fraction form
   2,488.21/3,433.53 = 1,440.34/x
3. Step 3: Cross multiply
   2,488.21x = 3,433.53 × 1,440.34
4. Step 4: Simplify right side
   2,488.21x = 4,945,450.60
5. Step 5: Solve for x
   x = 4,945,450.60/2,488.21
6. Step 6: Final answer
   x = 1,987.55