Finding the Fourth Proportional to 22,161.78, 30,582.72 and 12,730.14

Step by Step Solution

1. Step 1: Write the proportion equation
   22,161.78 : 30,582.72 = 12,730.14 : x
2. Step 2: Convert to fraction form
   22,161.78/30,582.72 = 12,730.14/x
3. Step 3: Cross multiply
   22,161.78x = 30,582.72 × 12,730.14
4. Step 4: Simplify right side
   22,161.78x = 389,322,307.18
5. Step 5: Solve for x
   x = 389,322,307.18/22,161.78
6. Step 6: Final answer
   x = 17,567.29