Finding the Fourth Proportional to 2,621.68, 3,617.89 and 1,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.68 : 3,617.89 = 1,442.72 : x
2. Step 2: Convert to fraction form
   2,621.68/3,617.89 = 1,442.72/x
3. Step 3: Cross multiply
   2,621.68x = 3,617.89 × 1,442.72
4. Step 4: Simplify right side
   2,621.68x = 5,219,607.70
5. Step 5: Solve for x
   x = 5,219,607.70/2,621.68
6. Step 6: Final answer
   x = 1,990.94