Finding the Fourth Proportional to 22,086.72, 30,486.24 and 12,661.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,086.72 : 30,486.24 = 12,661.56 : x
2. Step 2: Convert to fraction form
   22,086.72/30,486.24 = 12,661.56/x
3. Step 3: Cross multiply
   22,086.72x = 30,486.24 × 12,661.56
4. Step 4: Simplify right side
   22,086.72x = 386,003,356.93
5. Step 5: Solve for x
   x = 386,003,356.93/22,086.72
6. Step 6: Final answer
   x = 17,476.72