Finding the Fourth Proportional to 8,171.28, 12,257.72 and 2,624.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,171.28 : 12,257.72 = 2,624.72 : x
2. Step 2: Convert to fraction form
   8,171.28/12,257.72 = 2,624.72/x
3. Step 3: Cross multiply
   8,171.28x = 12,257.72 × 2,624.72
4. Step 4: Simplify right side
   8,171.28x = 32,173,082.84
5. Step 5: Solve for x
   x = 32,173,082.84/8,171.28
6. Step 6: Final answer
   x = 3,937.34