Finding the Fourth Proportional to 2,819.88, 3,887.82 and 2,189.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.88 : 3,887.82 = 2,189.34 : x
2. Step 2: Convert to fraction form
   2,819.88/3,887.82 = 2,189.34/x
3. Step 3: Cross multiply
   2,819.88x = 3,887.82 × 2,189.34
4. Step 4: Simplify right side
   2,819.88x = 8,511,759.84
5. Step 5: Solve for x
   x = 8,511,759.84/2,819.88
6. Step 6: Final answer
   x = 3,018.48