Finding the Fourth Proportional to 21,578.69, 32,375.82 and 7,540.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,578.69 : 32,375.82 = 7,540.79 : x
2. Step 2: Convert to fraction form
   21,578.69/32,375.82 = 7,540.79/x
3. Step 3: Cross multiply
   21,578.69x = 32,375.82 × 7,540.79
4. Step 4: Simplify right side
   21,578.69x = 244,139,259.70
5. Step 5: Solve for x
   x = 244,139,259.70/21,578.69
6. Step 6: Final answer
   x = 11,313.91