Finding the Fourth Proportional to 2,621.55, 3,617.75 and 1,442.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.55 : 3,617.75 = 1,442.63 : x
2. Step 2: Convert to fraction form
   2,621.55/3,617.75 = 1,442.63/x
3. Step 3: Cross multiply
   2,621.55x = 3,617.75 × 1,442.63
4. Step 4: Simplify right side
   2,621.55x = 5,219,049.38
5. Step 5: Solve for x
   x = 5,219,049.38/2,621.55
6. Step 6: Final answer
   x = 1,990.82