Finding the Fourth Proportional to 8,766.63, 13,142.15 and 3,218.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.63 : 13,142.15 = 3,218.71 : x
2. Step 2: Convert to fraction form
   8,766.63/13,142.15 = 3,218.71/x
3. Step 3: Cross multiply
   8,766.63x = 13,142.15 × 3,218.71
4. Step 4: Simplify right side
   8,766.63x = 42,300,769.63
5. Step 5: Solve for x
   x = 42,300,769.63/8,766.63
6. Step 6: Final answer
   x = 4,825.20