Finding the Fourth Proportional to 8,415.57, 12,622.89 and 2,571.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,415.57 : 12,622.89 = 2,571.72 : x
2. Step 2: Convert to fraction form
   8,415.57/12,622.89 = 2,571.72/x
3. Step 3: Cross multiply
   8,415.57x = 12,622.89 × 2,571.72
4. Step 4: Simplify right side
   8,415.57x = 32,462,538.67
5. Step 5: Solve for x
   x = 32,462,538.67/8,415.57
6. Step 6: Final answer
   x = 3,857.44