Finding the Fourth Proportional to 20,610.72, 30,917.97 and 5,618.03

Step by Step Solution

1. Step 1: Write the proportion equation
   20,610.72 : 30,917.97 = 5,618.03 : x
2. Step 2: Convert to fraction form
   20,610.72/30,917.97 = 5,618.03/x
3. Step 3: Cross multiply
   20,610.72x = 30,917.97 × 5,618.03
4. Step 4: Simplify right side
   20,610.72x = 173,697,928.41
5. Step 5: Solve for x
   x = 173,697,928.41/20,610.72
6. Step 6: Final answer
   x = 8,427.55