Finding the Fourth Proportional to 12,996.20, 19,498.82 and 4,231.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,996.20 : 19,498.82 = 4,231.05 : x
2. Step 2: Convert to fraction form
   12,996.20/19,498.82 = 4,231.05/x
3. Step 3: Cross multiply
   12,996.20x = 19,498.82 × 4,231.05
4. Step 4: Simplify right side
   12,996.20x = 82,500,461.21
5. Step 5: Solve for x
   x = 82,500,461.21/12,996.20
6. Step 6: Final answer
   x = 6,348.05