Finding the Fourth Proportional to 22,365.72, 30,864.03 and 12,805.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,365.72 : 30,864.03 = 12,805.29 : x
2. Step 2: Convert to fraction form
   22,365.72/30,864.03 = 12,805.29/x
3. Step 3: Cross multiply
   22,365.72x = 30,864.03 × 12,805.29
4. Step 4: Simplify right side
   22,365.72x = 395,222,854.72
5. Step 5: Solve for x
   x = 395,222,854.72/22,365.72
6. Step 6: Final answer
   x = 17,670.92