Finding the Fourth Proportional to 8,156.43, 11,249.42 and 5,169.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.43 : 11,249.42 = 5,169.42 : x
2. Step 2: Convert to fraction form
   8,156.43/11,249.42 = 5,169.42/x
3. Step 3: Cross multiply
   8,156.43x = 11,249.42 × 5,169.42
4. Step 4: Simplify right side
   8,156.43x = 58,152,950.89
5. Step 5: Solve for x
   x = 58,152,950.89/8,156.43
6. Step 6: Final answer
   x = 7,129.71