Finding the Fourth Proportional to 22,158.90, 30,579.94 and 12,087.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,158.90 : 30,579.94 = 12,087.91 : x
2. Step 2: Convert to fraction form
   22,158.90/30,579.94 = 12,087.91/x
3. Step 3: Cross multiply
   22,158.90x = 30,579.94 × 12,087.91
4. Step 4: Simplify right side
   22,158.90x = 369,647,562.53
5. Step 5: Solve for x
   x = 369,647,562.53/22,158.90
6. Step 6: Final answer
   x = 16,681.67