Finding the Fourth Proportional to 20,418.50, 30,624.03 and 5,624.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,418.50 : 30,624.03 = 5,624.25 : x
2. Step 2: Convert to fraction form
   20,418.50/30,624.03 = 5,624.25/x
3. Step 3: Cross multiply
   20,418.50x = 30,624.03 × 5,624.25
4. Step 4: Simplify right side
   20,418.50x = 172,237,200.73
5. Step 5: Solve for x
   x = 172,237,200.73/20,418.50
6. Step 6: Final answer
   x = 8,435.35