Finding the Fourth Proportional to 22,120.08, 30,524.76 and 12,689.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,120.08 : 30,524.76 = 12,689.52 : x
2. Step 2: Convert to fraction form
   22,120.08/30,524.76 = 12,689.52/x
3. Step 3: Cross multiply
   22,120.08x = 30,524.76 × 12,689.52
4. Step 4: Simplify right side
   22,120.08x = 387,344,552.52
5. Step 5: Solve for x
   x = 387,344,552.52/22,120.08
6. Step 6: Final answer
   x = 17,510.99