Finding the Fourth Proportional to 22,164.72, 30,591.27 and 13,212.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,164.72 : 30,591.27 = 13,212.81 : x
2. Step 2: Convert to fraction form
   22,164.72/30,591.27 = 13,212.81/x
3. Step 3: Cross multiply
   22,164.72x = 30,591.27 × 13,212.81
4. Step 4: Simplify right side
   22,164.72x = 404,196,638.17
5. Step 5: Solve for x
   x = 404,196,638.17/22,164.72
6. Step 6: Final answer
   x = 18,236.04