Finding the Fourth Proportional to 2,621.15, 3,617.24 and 1,442.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.15 : 3,617.24 = 1,442.28 : x
2. Step 2: Convert to fraction form
   2,621.15/3,617.24 = 1,442.28/x
3. Step 3: Cross multiply
   2,621.15x = 3,617.24 × 1,442.28
4. Step 4: Simplify right side
   2,621.15x = 5,217,065.70
5. Step 5: Solve for x
   x = 5,217,065.70/2,621.15
6. Step 6: Final answer
   x = 1,990.38