Finding the Fourth Proportional to 31,401.42, 46,912.31 and 20,216.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,401.42 : 46,912.31 = 20,216.94 : x
2. Step 2: Convert to fraction form
   31,401.42/46,912.31 = 20,216.94/x
3. Step 3: Cross multiply
   31,401.42x = 46,912.31 × 20,216.94
4. Step 4: Simplify right side
   31,401.42x = 948,423,255.45
5. Step 5: Solve for x
   x = 948,423,255.45/31,401.42
6. Step 6: Final answer
   x = 30,203.20