Finding the Fourth Proportional to 8,940.72, 12,331.56 and 5,751.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,940.72 : 12,331.56 = 5,751.12 : x
2. Step 2: Convert to fraction form
   8,940.72/12,331.56 = 5,751.12/x
3. Step 3: Cross multiply
   8,940.72x = 12,331.56 × 5,751.12
4. Step 4: Simplify right side
   8,940.72x = 70,920,281.35
5. Step 5: Solve for x
   x = 70,920,281.35/8,940.72
6. Step 6: Final answer
   x = 7,932.28