Finding the Fourth Proportional to 8,097.98, 12,139.77 and 3,171.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,097.98 : 12,139.77 = 3,171.15 : x
2. Step 2: Convert to fraction form
   8,097.98/12,139.77 = 3,171.15/x
3. Step 3: Cross multiply
   8,097.98x = 12,139.77 × 3,171.15
4. Step 4: Simplify right side
   8,097.98x = 38,497,043.53
5. Step 5: Solve for x
   x = 38,497,043.53/8,097.98
6. Step 6: Final answer
   x = 4,753.91