Finding the Fourth Proportional to 8,128.83, 12,192.17 and 3,197.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.83 : 12,192.17 = 3,197.15 : x
2. Step 2: Convert to fraction form
   8,128.83/12,192.17 = 3,197.15/x
3. Step 3: Cross multiply
   8,128.83x = 12,192.17 × 3,197.15
4. Step 4: Simplify right side
   8,128.83x = 38,980,119.37
5. Step 5: Solve for x
   x = 38,980,119.37/8,128.83
6. Step 6: Final answer
   x = 4,795.29