Finding the Fourth Proportional to 31,441.41, 43,411.37 and 20,853.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,441.41 : 43,411.37 = 20,853.09 : x
2. Step 2: Convert to fraction form
   31,441.41/43,411.37 = 20,853.09/x
3. Step 3: Cross multiply
   31,441.41x = 43,411.37 × 20,853.09
4. Step 4: Simplify right side
   31,441.41x = 905,261,101.37
5. Step 5: Solve for x
   x = 905,261,101.37/31,441.41
6. Step 6: Final answer
   x = 28,792.00