Finding the Fourth Proportional to 21,853.69, 32,780.56 and 9,365.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,853.69 : 32,780.56 = 9,365.61 : x
2. Step 2: Convert to fraction form
   21,853.69/32,780.56 = 9,365.61/x
3. Step 3: Cross multiply
   21,853.69x = 32,780.56 × 9,365.61
4. Step 4: Simplify right side
   21,853.69x = 307,009,940.54
5. Step 5: Solve for x
   x = 307,009,940.54/21,853.69
6. Step 6: Final answer
   x = 14,048.43