Finding the Fourth Proportional to 8,456.18, 12,685.86 and 2,611.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,456.18 : 12,685.86 = 2,611.42 : x
2. Step 2: Convert to fraction form
   8,456.18/12,685.86 = 2,611.42/x
3. Step 3: Cross multiply
   8,456.18x = 12,685.86 × 2,611.42
4. Step 4: Simplify right side
   8,456.18x = 33,128,108.52
5. Step 5: Solve for x
   x = 33,128,108.52/8,456.18
6. Step 6: Final answer
   x = 3,917.62