Finding the Fourth Proportional to 22,213.72, 30,661.50 and 12,788.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,213.72 : 30,661.50 = 12,788.92 : x
2. Step 2: Convert to fraction form
   22,213.72/30,661.50 = 12,788.92/x
3. Step 3: Cross multiply
   22,213.72x = 30,661.50 × 12,788.92
4. Step 4: Simplify right side
   22,213.72x = 392,127,470.58
5. Step 5: Solve for x
   x = 392,127,470.58/22,213.72
6. Step 6: Final answer
   x = 17,652.49