Finding the Fourth Proportional to 22,820.24, 31,491.98 and 12,884.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,820.24 : 31,491.98 = 12,884.24 : x
2. Step 2: Convert to fraction form
   22,820.24/31,491.98 = 12,884.24/x
3. Step 3: Cross multiply
   22,820.24x = 31,491.98 × 12,884.24
4. Step 4: Simplify right side
   22,820.24x = 405,750,228.40
5. Step 5: Solve for x
   x = 405,750,228.40/22,820.24
6. Step 6: Final answer
   x = 17,780.28