Finding the Fourth Proportional to 2,621.18, 3,617.22 and 1,442.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.18 : 3,617.22 = 1,442.24 : x
2. Step 2: Convert to fraction form
   2,621.18/3,617.22 = 1,442.24/x
3. Step 3: Cross multiply
   2,621.18x = 3,617.22 × 1,442.24
4. Step 4: Simplify right side
   2,621.18x = 5,216,899.37
5. Step 5: Solve for x
   x = 5,216,899.37/2,621.18
6. Step 6: Final answer
   x = 1,990.29