Finding the Fourth Proportional to 20,942.28, 31,410.18 and 13,598.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,942.28 : 31,410.18 = 13,598.82 : x
2. Step 2: Convert to fraction form
   20,942.28/31,410.18 = 13,598.82/x
3. Step 3: Cross multiply
   20,942.28x = 31,410.18 × 13,598.82
4. Step 4: Simplify right side
   20,942.28x = 427,141,383.99
5. Step 5: Solve for x
   x = 427,141,383.99/20,942.28
6. Step 6: Final answer
   x = 20,396.13