Finding the Fourth Proportional to 22,214.88, 30,661.76 and 12,788.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,214.88 : 30,661.76 = 12,788.96 : x
2. Step 2: Convert to fraction form
   22,214.88/30,661.76 = 12,788.96/x
3. Step 3: Cross multiply
   22,214.88x = 30,661.76 × 12,788.96
4. Step 4: Simplify right side
   22,214.88x = 392,132,022.17
5. Step 5: Solve for x
   x = 392,132,022.17/22,214.88
6. Step 6: Final answer
   x = 17,651.77