Finding the Fourth Proportional to 22,894.10, 31,586.68 and 12,821.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,894.10 : 31,586.68 = 12,821.18 : x
2. Step 2: Convert to fraction form
   22,894.10/31,586.68 = 12,821.18/x
3. Step 3: Cross multiply
   22,894.10x = 31,586.68 × 12,821.18
4. Step 4: Simplify right side
   22,894.10x = 404,978,319.90
5. Step 5: Solve for x
   x = 404,978,319.90/22,894.10
6. Step 6: Final answer
   x = 17,689.20