Finding the Fourth Proportional to 2,488.95, 3,435.06 and 1,440.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.95 : 3,435.06 = 1,440.81 : x
2. Step 2: Convert to fraction form
   2,488.95/3,435.06 = 1,440.81/x
3. Step 3: Cross multiply
   2,488.95x = 3,435.06 × 1,440.81
4. Step 4: Simplify right side
   2,488.95x = 4,949,268.80
5. Step 5: Solve for x
   x = 4,949,268.80/2,488.95
6. Step 6: Final answer
   x = 1,988.50