Finding the Fourth Proportional to 21,147.18, 31,720.41 and 7,295.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,147.18 : 31,720.41 = 7,295.82 : x
2. Step 2: Convert to fraction form
   21,147.18/31,720.41 = 7,295.82/x
3. Step 3: Cross multiply
   21,147.18x = 31,720.41 × 7,295.82
4. Step 4: Simplify right side
   21,147.18x = 231,426,401.69
5. Step 5: Solve for x
   x = 231,426,401.69/21,147.18
6. Step 6: Final answer
   x = 10,943.61