Finding the Fourth Proportional to 31,817.69, 43,930.37 and 19,886.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,817.69 : 43,930.37 = 19,886.39 : x
2. Step 2: Convert to fraction form
   31,817.69/43,930.37 = 19,886.39/x
3. Step 3: Cross multiply
   31,817.69x = 43,930.37 × 19,886.39
4. Step 4: Simplify right side
   31,817.69x = 873,616,300.73
5. Step 5: Solve for x
   x = 873,616,300.73/31,817.69
6. Step 6: Final answer
   x = 27,456.94