Finding the Fourth Proportional to 8,186.32, 12,274.56 and 3,256.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,186.32 : 12,274.56 = 3,256.72 : x
2. Step 2: Convert to fraction form
   8,186.32/12,274.56 = 3,256.72/x
3. Step 3: Cross multiply
   8,186.32x = 12,274.56 × 3,256.72
4. Step 4: Simplify right side
   8,186.32x = 39,974,805.04
5. Step 5: Solve for x
   x = 39,974,805.04/8,186.32
6. Step 6: Final answer
   x = 4,883.12