Finding the Fourth Proportional to 20,616.18, 30,910.83 and 13,574.88

Step by Step Solution

1. Step 1: Write the proportion equation
   20,616.18 : 30,910.83 = 13,574.88 : x
2. Step 2: Convert to fraction form
   20,616.18/30,910.83 = 13,574.88/x
3. Step 3: Cross multiply
   20,616.18x = 30,910.83 × 13,574.88
4. Step 4: Simplify right side
   20,616.18x = 419,610,807.95
5. Step 5: Solve for x
   x = 419,610,807.95/20,616.18
6. Step 6: Final answer
   x = 20,353.47