Finding the Fourth Proportional to 33,821.31, 46,665 and 20,400.42

Step by Step Solution

1. Step 1: Write the proportion equation
   33,821.31 : 46,665 = 20,400.42 : x
2. Step 2: Convert to fraction form
   33,821.31/46,665 = 20,400.42/x
3. Step 3: Cross multiply
   33,821.31x = 46,665 × 20,400.42
4. Step 4: Simplify right side
   33,821.31x = 951,985,599.30
5. Step 5: Solve for x
   x = 951,985,599.30/33,821.31
6. Step 6: Final answer
   x = 28,147.51