Finding the Fourth Proportional to 2,491.49, 3,438.45 and 1,443.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.49 : 3,438.45 = 1,443.76 : x
2. Step 2: Convert to fraction form
   2,491.49/3,438.45 = 1,443.76/x
3. Step 3: Cross multiply
   2,491.49x = 3,438.45 × 1,443.76
4. Step 4: Simplify right side
   2,491.49x = 4,964,287.98
5. Step 5: Solve for x
   x = 4,964,287.98/2,491.49
6. Step 6: Final answer
   x = 1,992.50