Finding the Fourth Proportional to 5,105.87, 7,658.78 and 1,819.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.87 : 7,658.78 = 1,819.08 : x
2. Step 2: Convert to fraction form
   5,105.87/7,658.78 = 1,819.08/x
3. Step 3: Cross multiply
   5,105.87x = 7,658.78 × 1,819.08
4. Step 4: Simplify right side
   5,105.87x = 13,931,924.43
5. Step 5: Solve for x
   x = 13,931,924.43/5,105.87
6. Step 6: Final answer
   x = 2,728.61