Finding the Fourth Proportional to 22,158.72, 30,582.99 and 13,206.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,158.72 : 30,582.99 = 13,206.80 : x
2. Step 2: Convert to fraction form
   22,158.72/30,582.99 = 13,206.80/x
3. Step 3: Cross multiply
   22,158.72x = 30,582.99 × 13,206.80
4. Step 4: Simplify right side
   22,158.72x = 403,903,279.42
5. Step 5: Solve for x
   x = 403,903,279.42/22,158.72
6. Step 6: Final answer
   x = 18,227.74