Finding the Fourth Proportional to 9,410.69, 12,986.69 and 5,161.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.69 : 12,986.69 = 5,161.79 : x
2. Step 2: Convert to fraction form
   9,410.69/12,986.69 = 5,161.79/x
3. Step 3: Cross multiply
   9,410.69x = 12,986.69 × 5,161.79
4. Step 4: Simplify right side
   9,410.69x = 67,034,475.83
5. Step 5: Solve for x
   x = 67,034,475.83/9,410.69
6. Step 6: Final answer
   x = 7,123.23