Finding the Fourth Proportional to 2,491.86, 3,438.62 and 1,443.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.86 : 3,438.62 = 1,443.90 : x
2. Step 2: Convert to fraction form
   2,491.86/3,438.62 = 1,443.90/x
3. Step 3: Cross multiply
   2,491.86x = 3,438.62 × 1,443.90
4. Step 4: Simplify right side
   2,491.86x = 4,965,023.42
5. Step 5: Solve for x
   x = 4,965,023.42/2,491.86
6. Step 6: Final answer
   x = 1,992.50