Finding the Fourth Proportional to 8,185.20, 12,276.64 and 2,637.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,185.20 : 12,276.64 = 2,637.89 : x
2. Step 2: Convert to fraction form
   8,185.20/12,276.64 = 2,637.89/x
3. Step 3: Cross multiply
   8,185.20x = 12,276.64 × 2,637.89
4. Step 4: Simplify right side
   8,185.20x = 32,384,425.89
5. Step 5: Solve for x
   x = 32,384,425.89/8,185.20
6. Step 6: Final answer
   x = 3,956.46