Finding the Fourth Proportional to 22,157.90, 30,578.56 and 12,086.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,157.90 : 30,578.56 = 12,086.91 : x
2. Step 2: Convert to fraction form
   22,157.90/30,578.56 = 12,086.91/x
3. Step 3: Cross multiply
   22,157.90x = 30,578.56 × 12,086.91
4. Step 4: Simplify right side
   22,157.90x = 369,600,272.43
5. Step 5: Solve for x
   x = 369,600,272.43/22,157.90
6. Step 6: Final answer
   x = 16,680.30