Finding the Fourth Proportional to 8,156.50, 12,234.78 and 3,227.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.50 : 12,234.78 = 3,227.31 : x
2. Step 2: Convert to fraction form
   8,156.50/12,234.78 = 3,227.31/x
3. Step 3: Cross multiply
   8,156.50x = 12,234.78 × 3,227.31
4. Step 4: Simplify right side
   8,156.50x = 39,485,427.84
5. Step 5: Solve for x
   x = 39,485,427.84/8,156.50
6. Step 6: Final answer
   x = 4,840.98