Finding the Fourth Proportional to 20,408.52, 30,624.61 and 8,561.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,408.52 : 30,624.61 = 8,561.25 : x
2. Step 2: Convert to fraction form
   20,408.52/30,624.61 = 8,561.25/x
3. Step 3: Cross multiply
   20,408.52x = 30,624.61 × 8,561.25
4. Step 4: Simplify right side
   20,408.52x = 262,184,937.01
5. Step 5: Solve for x
   x = 262,184,937.01/20,408.52
6. Step 6: Final answer
   x = 12,846.83