Finding the Fourth Proportional to 8,127.12, 12,188.56 and 3,196.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,127.12 : 12,188.56 = 3,196.86 : x
2. Step 2: Convert to fraction form
   8,127.12/12,188.56 = 3,196.86/x
3. Step 3: Cross multiply
   8,127.12x = 12,188.56 × 3,196.86
4. Step 4: Simplify right side
   8,127.12x = 38,965,119.92
5. Step 5: Solve for x
   x = 38,965,119.92/8,127.12
6. Step 6: Final answer
   x = 4,794.46