Finding the Fourth Proportional to 31,648.42, 43,673.10 and 18,901.90

Step by Step Solution

1. Step 1: Write the proportion equation
   31,648.42 : 43,673.10 = 18,901.90 : x
2. Step 2: Convert to fraction form
   31,648.42/43,673.10 = 18,901.90/x
3. Step 3: Cross multiply
   31,648.42x = 43,673.10 × 18,901.90
4. Step 4: Simplify right side
   31,648.42x = 825,504,568.89
5. Step 5: Solve for x
   x = 825,504,568.89/31,648.42
6. Step 6: Final answer
   x = 26,083.59