Finding the Fourth Proportional to 8,131.73, 12,201.10 and 3,454.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.73 : 12,201.10 = 3,454.89 : x
2. Step 2: Convert to fraction form
   8,131.73/12,201.10 = 3,454.89/x
3. Step 3: Cross multiply
   8,131.73x = 12,201.10 × 3,454.89
4. Step 4: Simplify right side
   8,131.73x = 42,153,403.99
5. Step 5: Solve for x
   x = 42,153,403.99/8,131.73
6. Step 6: Final answer
   x = 5,183.82