Finding the Fourth Proportional to 2,621.22, 3,617.21 and 1,442.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.22 : 3,617.21 = 1,442.29 : x
2. Step 2: Convert to fraction form
   2,621.22/3,617.21 = 1,442.29/x
3. Step 3: Cross multiply
   2,621.22x = 3,617.21 × 1,442.29
4. Step 4: Simplify right side
   2,621.22x = 5,217,065.81
5. Step 5: Solve for x
   x = 5,217,065.81/2,621.22
6. Step 6: Final answer
   x = 1,990.32