Finding the Fourth Proportional to 31,401.35, 47,141.99 and 20,354.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31,401.35 : 47,141.99 = 20,354.27 : x
2. Step 2: Convert to fraction form
   31,401.35/47,141.99 = 20,354.27/x
3. Step 3: Cross multiply
   31,401.35x = 47,141.99 × 20,354.27
4. Step 4: Simplify right side
   31,401.35x = 959,540,455.32
5. Step 5: Solve for x
   x = 959,540,455.32/31,401.35
6. Step 6: Final answer
   x = 30,557.30