Finding the Fourth Proportional to 8,169.55, 12,256.72 and 2,622.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,169.55 : 12,256.72 = 2,622.78 : x
2. Step 2: Convert to fraction form
   8,169.55/12,256.72 = 2,622.78/x
3. Step 3: Cross multiply
   8,169.55x = 12,256.72 × 2,622.78
4. Step 4: Simplify right side
   8,169.55x = 32,146,673.52
5. Step 5: Solve for x
   x = 32,146,673.52/8,169.55
6. Step 6: Final answer
   x = 3,934.94