Finding the Fourth Proportional to 20,414.37, 30,617.97 and 5,619.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,414.37 : 30,617.97 = 5,619.72 : x
2. Step 2: Convert to fraction form
   20,414.37/30,617.97 = 5,619.72/x
3. Step 3: Cross multiply
   20,414.37x = 30,617.97 × 5,619.72
4. Step 4: Simplify right side
   20,414.37x = 172,064,418.37
5. Step 5: Solve for x
   x = 172,064,418.37/20,414.37
6. Step 6: Final answer
   x = 8,428.59