Finding the Fourth Proportional to 9,401.68, 12,976.32 and 6,215.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.68 : 12,976.32 = 6,215.52 : x
2. Step 2: Convert to fraction form
   9,401.68/12,976.32 = 6,215.52/x
3. Step 3: Cross multiply
   9,401.68x = 12,976.32 × 6,215.52
4. Step 4: Simplify right side
   9,401.68x = 80,654,576.49
5. Step 5: Solve for x
   x = 80,654,576.49/9,401.68
6. Step 6: Final answer
   x = 8,578.74