Finding the Fourth Proportional to 31,641.69, 43,676.52 and 18,218.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,641.69 : 43,676.52 = 18,218.29 : x
2. Step 2: Convert to fraction form
   31,641.69/43,676.52 = 18,218.29/x
3. Step 3: Cross multiply
   31,641.69x = 43,676.52 × 18,218.29
4. Step 4: Simplify right side
   31,641.69x = 795,711,493.83
5. Step 5: Solve for x
   x = 795,711,493.83/31,641.69
6. Step 6: Final answer
   x = 25,147.57