Finding the Fourth Proportional to 5,819.10, 8,719.34 and 5,665.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,819.10 : 8,719.34 = 5,665.34 : x
2. Step 2: Convert to fraction form
   5,819.10/8,719.34 = 5,665.34/x
3. Step 3: Cross multiply
   5,819.10x = 8,719.34 × 5,665.34
4. Step 4: Simplify right side
   5,819.10x = 49,397,953.75
5. Step 5: Solve for x
   x = 49,397,953.75/5,819.10
6. Step 6: Final answer
   x = 8,488.93