Finding the Fourth Proportional to 8,196.12, 12,289.86 and 2,928.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,196.12 : 12,289.86 = 2,928.96 : x
2. Step 2: Convert to fraction form
   8,196.12/12,289.86 = 2,928.96/x
3. Step 3: Cross multiply
   8,196.12x = 12,289.86 × 2,928.96
4. Step 4: Simplify right side
   8,196.12x = 35,996,508.35
5. Step 5: Solve for x
   x = 35,996,508.35/8,196.12
6. Step 6: Final answer
   x = 4,391.90