Finding the Fourth Proportional to 9,411.39, 12,986.87 and 5,162.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.39 : 12,986.87 = 5,162.27 : x
2. Step 2: Convert to fraction form
   9,411.39/12,986.87 = 5,162.27/x
3. Step 3: Cross multiply
   9,411.39x = 12,986.87 × 5,162.27
4. Step 4: Simplify right side
   9,411.39x = 67,041,638.65
5. Step 5: Solve for x
   x = 67,041,638.65/9,411.39
6. Step 6: Final answer
   x = 7,123.46