Finding the Fourth Proportional to 5,561.34, 7,661.46 and 3,879.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,561.34 : 7,661.46 = 3,879.69 : x
2. Step 2: Convert to fraction form
   5,561.34/7,661.46 = 3,879.69/x
3. Step 3: Cross multiply
   5,561.34x = 7,661.46 × 3,879.69
4. Step 4: Simplify right side
   5,561.34x = 29,724,089.75
5. Step 5: Solve for x
   x = 29,724,089.75/5,561.34
6. Step 6: Final answer
   x = 5,344.77