Finding the Fourth Proportional to 2,621.69, 3,617.93 and 1,442.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.69 : 3,617.93 = 1,442.80 : x
2. Step 2: Convert to fraction form
   2,621.69/3,617.93 = 1,442.80/x
3. Step 3: Cross multiply
   2,621.69x = 3,617.93 × 1,442.80
4. Step 4: Simplify right side
   2,621.69x = 5,219,949.40
5. Step 5: Solve for x
   x = 5,219,949.40/2,621.69
6. Step 6: Final answer
   x = 1,991.06