Finding the Fourth Proportional to 2,621.28, 3,617.56 and 1,442.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.28 : 3,617.56 = 1,442.38 : x
2. Step 2: Convert to fraction form
   2,621.28/3,617.56 = 1,442.38/x
3. Step 3: Cross multiply
   2,621.28x = 3,617.56 × 1,442.38
4. Step 4: Simplify right side
   2,621.28x = 5,217,896.19
5. Step 5: Solve for x
   x = 5,217,896.19/2,621.28
6. Step 6: Final answer
   x = 1,990.59