Finding the Fourth Proportional to 10,441.20, 14,408.78 and 5,725.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,441.20 : 14,408.78 = 5,725.40 : x
2. Step 2: Convert to fraction form
   10,441.20/14,408.78 = 5,725.40/x
3. Step 3: Cross multiply
   10,441.20x = 14,408.78 × 5,725.40
4. Step 4: Simplify right side
   10,441.20x = 82,496,029.01
5. Step 5: Solve for x
   x = 82,496,029.01/10,441.20
6. Step 6: Final answer
   x = 7,901.01