Finding the Fourth Proportional to 2,491.21, 3,437.67 and 1,443.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.21 : 3,437.67 = 1,443.34 : x
2. Step 2: Convert to fraction form
   2,491.21/3,437.67 = 1,443.34/x
3. Step 3: Cross multiply
   2,491.21x = 3,437.67 × 1,443.34
4. Step 4: Simplify right side
   2,491.21x = 4,961,726.62
5. Step 5: Solve for x
   x = 4,961,726.62/2,491.21
6. Step 6: Final answer
   x = 1,991.69