Finding the Fourth Proportional to 2,819.69, 3,891.89 and 1,877.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,819.69 : 3,891.89 = 1,877.06 : x
2. Step 2: Convert to fraction form
   2,819.69/3,891.89 = 1,877.06/x
3. Step 3: Cross multiply
   2,819.69x = 3,891.89 × 1,877.06
4. Step 4: Simplify right side
   2,819.69x = 7,305,311.04
5. Step 5: Solve for x
   x = 7,305,311.04/2,819.69
6. Step 6: Final answer
   x = 2,590.82