Finding the Fourth Proportional to 8,131.50, 12,199.10 and 3,451.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.50 : 12,199.10 = 3,451.68 : x
2. Step 2: Convert to fraction form
   8,131.50/12,199.10 = 3,451.68/x
3. Step 3: Cross multiply
   8,131.50x = 12,199.10 × 3,451.68
4. Step 4: Simplify right side
   8,131.50x = 42,107,372.23
5. Step 5: Solve for x
   x = 42,107,372.23/8,131.50
6. Step 6: Final answer
   x = 5,178.30