Finding the Fourth Proportional to 8,612.82, 12,921.27 and 2,769.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,612.82 : 12,921.27 = 2,769.42 : x
2. Step 2: Convert to fraction form
   8,612.82/12,921.27 = 2,769.42/x
3. Step 3: Cross multiply
   8,612.82x = 12,921.27 × 2,769.42
4. Step 4: Simplify right side
   8,612.82x = 35,784,423.56
5. Step 5: Solve for x
   x = 35,784,423.56/8,612.82
6. Step 6: Final answer
   x = 4,154.79