Finding the Fourth Proportional to 8,131.62, 12,199.56 and 3,451.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.62 : 12,199.56 = 3,451.80 : x
2. Step 2: Convert to fraction form
   8,131.62/12,199.56 = 3,451.80/x
3. Step 3: Cross multiply
   8,131.62x = 12,199.56 × 3,451.80
4. Step 4: Simplify right side
   8,131.62x = 42,110,441.21
5. Step 5: Solve for x
   x = 42,110,441.21/8,131.62
6. Step 6: Final answer
   x = 5,178.60