Finding the Fourth Proportional to 20,945.28, 31,414.68 and 13,601.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,945.28 : 31,414.68 = 13,601.82 : x
2. Step 2: Convert to fraction form
   20,945.28/31,414.68 = 13,601.82/x
3. Step 3: Cross multiply
   20,945.28x = 31,414.68 × 13,601.82
4. Step 4: Simplify right side
   20,945.28x = 427,296,822.72
5. Step 5: Solve for x
   x = 427,296,822.72/20,945.28
6. Step 6: Final answer
   x = 20,400.63