Finding the Fourth Proportional to 22,158.98, 30,578.84 and 12,087.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,158.98 : 30,578.84 = 12,087.65 : x
2. Step 2: Convert to fraction form
   22,158.98/30,578.84 = 12,087.65/x
3. Step 3: Cross multiply
   22,158.98x = 30,578.84 × 12,087.65
4. Step 4: Simplify right side
   22,158.98x = 369,626,254.89
5. Step 5: Solve for x
   x = 369,626,254.89/22,158.98
6. Step 6: Final answer
   x = 16,680.65