Finding the Fourth Proportional to 22,820.69, 31,491.43 and 12,747.13

Step by Step Solution

1. Step 1: Write the proportion equation
   22,820.69 : 31,491.43 = 12,747.13 : x
2. Step 2: Convert to fraction form
   22,820.69/31,491.43 = 12,747.13/x
3. Step 3: Cross multiply
   22,820.69x = 31,491.43 × 12,747.13
4. Step 4: Simplify right side
   22,820.69x = 401,425,352.10
5. Step 5: Solve for x
   x = 401,425,352.10/22,820.69
6. Step 6: Final answer
   x = 17,590.41