Finding the Fourth Proportional to 22,118.08, 30,524.72 and 12,689.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,118.08 : 30,524.72 = 12,689.68 : x
2. Step 2: Convert to fraction form
   22,118.08/30,524.72 = 12,689.68/x
3. Step 3: Cross multiply
   22,118.08x = 30,524.72 × 12,689.68
4. Step 4: Simplify right side
   22,118.08x = 387,348,928.89
5. Step 5: Solve for x
   x = 387,348,928.89/22,118.08
6. Step 6: Final answer
   x = 17,512.77