Finding the Fourth Proportional to 8,131.39, 12,182.70 and 5,661.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.39 : 12,182.70 = 5,661.43 : x
2. Step 2: Convert to fraction form
   8,131.39/12,182.70 = 5,661.43/x
3. Step 3: Cross multiply
   8,131.39x = 12,182.70 × 5,661.43
4. Step 4: Simplify right side
   8,131.39x = 68,971,494.03
5. Step 5: Solve for x
   x = 68,971,494.03/8,131.39
6. Step 6: Final answer
   x = 8,482.13