Finding the Fourth Proportional to 2,621.45, 3,617.63 and 1,442.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.45 : 3,617.63 = 1,442.55 : x
2. Step 2: Convert to fraction form
   2,621.45/3,617.63 = 1,442.55/x
3. Step 3: Cross multiply
   2,621.45x = 3,617.63 × 1,442.55
4. Step 4: Simplify right side
   2,621.45x = 5,218,612.16
5. Step 5: Solve for x
   x = 5,218,612.16/2,621.45
6. Step 6: Final answer
   x = 1,990.73