Finding the Fourth Proportional to 8,131.41, 12,188.74 and 3,199.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.41 : 12,188.74 = 3,199.05 : x
2. Step 2: Convert to fraction form
   8,131.41/12,188.74 = 3,199.05/x
3. Step 3: Cross multiply
   8,131.41x = 12,188.74 × 3,199.05
4. Step 4: Simplify right side
   8,131.41x = 38,992,388.70
5. Step 5: Solve for x
   x = 38,992,388.70/8,131.41
6. Step 6: Final answer
   x = 4,795.28