Finding the Fourth Proportional to 21,109.83, 31,673.25 and 7,965.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.83 : 31,673.25 = 7,965.96 : x
2. Step 2: Convert to fraction form
   21,109.83/31,673.25 = 7,965.96/x
3. Step 3: Cross multiply
   21,109.83x = 31,673.25 × 7,965.96
4. Step 4: Simplify right side
   21,109.83x = 252,307,842.57
5. Step 5: Solve for x
   x = 252,307,842.57/21,109.83
6. Step 6: Final answer
   x = 11,952.15