Finding the Fourth Proportional to 2,488.71, 3,434.58 and 1,440.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.71 : 3,434.58 = 1,440.77 : x
2. Step 2: Convert to fraction form
   2,488.71/3,434.58 = 1,440.77/x
3. Step 3: Cross multiply
   2,488.71x = 3,434.58 × 1,440.77
4. Step 4: Simplify right side
   2,488.71x = 4,948,439.83
5. Step 5: Solve for x
   x = 4,948,439.83/2,488.71
6. Step 6: Final answer
   x = 1,988.36