Finding the Fourth Proportional to 21,982.69, 30,341.61 and 12,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,982.69 : 30,341.61 = 12,556.72 : x
2. Step 2: Convert to fraction form
   21,982.69/30,341.61 = 12,556.72/x
3. Step 3: Cross multiply
   21,982.69x = 30,341.61 × 12,556.72
4. Step 4: Simplify right side
   21,982.69x = 380,991,101.12
5. Step 5: Solve for x
   x = 380,991,101.12/21,982.69
6. Step 6: Final answer
   x = 17,331.41