Finding the Fourth Proportional to 22,212.72, 30,643.08 and 13,131.97

Step by Step Solution

1. Step 1: Write the proportion equation
   22,212.72 : 30,643.08 = 13,131.97 : x
2. Step 2: Convert to fraction form
   22,212.72/30,643.08 = 13,131.97/x
3. Step 3: Cross multiply
   22,212.72x = 30,643.08 × 13,131.97
4. Step 4: Simplify right side
   22,212.72x = 402,404,007.27
5. Step 5: Solve for x
   x = 402,404,007.27/22,212.72
6. Step 6: Final answer
   x = 18,115.93