Finding the Fourth Proportional to 8,315.28, 12,474.72 and 2,769.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,315.28 : 12,474.72 = 2,769.12 : x
2. Step 2: Convert to fraction form
   8,315.28/12,474.72 = 2,769.12/x
3. Step 3: Cross multiply
   8,315.28x = 12,474.72 × 2,769.12
4. Step 4: Simplify right side
   8,315.28x = 34,543,996.65
5. Step 5: Solve for x
   x = 34,543,996.65/8,315.28
6. Step 6: Final answer
   x = 4,154.28