Finding the Fourth Proportional to 31,739.47, 43,805.88 and 19,641.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,739.47 : 43,805.88 = 19,641.31 : x
2. Step 2: Convert to fraction form
   31,739.47/43,805.88 = 19,641.31/x
3. Step 3: Cross multiply
   31,739.47x = 43,805.88 × 19,641.31
4. Step 4: Simplify right side
   31,739.47x = 860,404,759.39
5. Step 5: Solve for x
   x = 860,404,759.39/31,739.47
6. Step 6: Final answer
   x = 27,108.36