Finding the Fourth Proportional to 8,411.72, 12,617.76 and 2,171.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.72 : 12,617.76 = 2,171.86 : x
2. Step 2: Convert to fraction form
   8,411.72/12,617.76 = 2,171.86/x
3. Step 3: Cross multiply
   8,411.72x = 12,617.76 × 2,171.86
4. Step 4: Simplify right side
   8,411.72x = 27,404,008.23
5. Step 5: Solve for x
   x = 27,404,008.23/8,411.72
6. Step 6: Final answer
   x = 3,257.84