Finding the Fourth Proportional to 8,939.31, 12,330.60 and 5,756.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,939.31 : 12,330.60 = 5,756.76 : x
2. Step 2: Convert to fraction form
   8,939.31/12,330.60 = 5,756.76/x
3. Step 3: Cross multiply
   8,939.31x = 12,330.60 × 5,756.76
4. Step 4: Simplify right side
   8,939.31x = 70,984,304.86
5. Step 5: Solve for x
   x = 70,984,304.86/8,939.31
6. Step 6: Final answer
   x = 7,940.69