Finding the Fourth Proportional to 2,488.02, 3,433.50 and 1,439.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.02 : 3,433.50 = 1,439.88 : x
2. Step 2: Convert to fraction form
   2,488.02/3,433.50 = 1,439.88/x
3. Step 3: Cross multiply
   2,488.02x = 3,433.50 × 1,439.88
4. Step 4: Simplify right side
   2,488.02x = 4,943,827.98
5. Step 5: Solve for x
   x = 4,943,827.98/2,488.02
6. Step 6: Final answer
   x = 1,987.05