Finding the Fourth Proportional to 2,622.90, 3,619.29 and 1,443.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.90 : 3,619.29 = 1,443.90 : x
2. Step 2: Convert to fraction form
   2,622.90/3,619.29 = 1,443.90/x
3. Step 3: Cross multiply
   2,622.90x = 3,619.29 × 1,443.90
4. Step 4: Simplify right side
   2,622.90x = 5,225,892.83
5. Step 5: Solve for x
   x = 5,225,892.83/2,622.90
6. Step 6: Final answer
   x = 1,992.41