Finding the Fourth Proportional to 19,644.54, 29,470.05 and 7,965.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,644.54 : 29,470.05 = 7,965.78 : x
2. Step 2: Convert to fraction form
   19,644.54/29,470.05 = 7,965.78/x
3. Step 3: Cross multiply
   19,644.54x = 29,470.05 × 7,965.78
4. Step 4: Simplify right side
   19,644.54x = 234,751,934.89
5. Step 5: Solve for x
   x = 234,751,934.89/19,644.54
6. Step 6: Final answer
   x = 11,949.98