Finding the Fourth Proportional to 8,754.78, 12,072.21 and 5,765.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,754.78 : 12,072.21 = 5,765.42 : x
2. Step 2: Convert to fraction form
   8,754.78/12,072.21 = 5,765.42/x
3. Step 3: Cross multiply
   8,754.78x = 12,072.21 × 5,765.42
4. Step 4: Simplify right side
   8,754.78x = 69,601,300.62
5. Step 5: Solve for x
   x = 69,601,300.62/8,754.78
6. Step 6: Final answer
   x = 7,950.09