Finding the Fourth Proportional to 2,188.25, 3,018.89 and 1,442.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.25 : 3,018.89 = 1,442.56 : x
2. Step 2: Convert to fraction form
   2,188.25/3,018.89 = 1,442.56/x
3. Step 3: Cross multiply
   2,188.25x = 3,018.89 × 1,442.56
4. Step 4: Simplify right side
   2,188.25x = 4,354,907.65
5. Step 5: Solve for x
   x = 4,354,907.65/2,188.25
6. Step 6: Final answer
   x = 1,990.13