Finding the Fourth Proportional to 2,621.97, 3,618.34 and 1,443.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.97 : 3,618.34 = 1,443.05 : x
2. Step 2: Convert to fraction form
   2,621.97/3,618.34 = 1,443.05/x
3. Step 3: Cross multiply
   2,621.97x = 3,618.34 × 1,443.05
4. Step 4: Simplify right side
   2,621.97x = 5,221,437.41
5. Step 5: Solve for x
   x = 5,221,437.41/2,621.97
6. Step 6: Final answer
   x = 1,991.42