Finding the Fourth Proportional to 8,872.72, 12,240.48 and 5,333.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,872.72 : 12,240.48 = 5,333.90 : x
2. Step 2: Convert to fraction form
   8,872.72/12,240.48 = 5,333.90/x
3. Step 3: Cross multiply
   8,872.72x = 12,240.48 × 5,333.90
4. Step 4: Simplify right side
   8,872.72x = 65,289,496.27
5. Step 5: Solve for x
   x = 65,289,496.27/8,872.72
6. Step 6: Final answer
   x = 7,358.45