Finding the Fourth Proportional to 12,876.45, 17,771.82 and 7,571.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.45 : 17,771.82 = 7,571.55 : x
2. Step 2: Convert to fraction form
   12,876.45/17,771.82 = 7,571.55/x
3. Step 3: Cross multiply
   12,876.45x = 17,771.82 × 7,571.55
4. Step 4: Simplify right side
   12,876.45x = 134,560,223.72
5. Step 5: Solve for x
   x = 134,560,223.72/12,876.45
6. Step 6: Final answer
   x = 10,450.10