Finding the Fourth Proportional to 5,814.69, 8,722.13 and 5,519.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,814.69 : 8,722.13 = 5,519.31 : x
2. Step 2: Convert to fraction form
   5,814.69/8,722.13 = 5,519.31/x
3. Step 3: Cross multiply
   5,814.69x = 8,722.13 × 5,519.31
4. Step 4: Simplify right side
   5,814.69x = 48,140,111.73
5. Step 5: Solve for x
   x = 48,140,111.73/5,814.69
6. Step 6: Final answer
   x = 8,279.05