Finding the Fourth Proportional to 22,225.28, 30,660.61 and 12,788.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,225.28 : 30,660.61 = 12,788.38 : x
2. Step 2: Convert to fraction form
   22,225.28/30,660.61 = 12,788.38/x
3. Step 3: Cross multiply
   22,225.28x = 30,660.61 × 12,788.38
4. Step 4: Simplify right side
   22,225.28x = 392,099,314.47
5. Step 5: Solve for x
   x = 392,099,314.47/22,225.28
6. Step 6: Final answer
   x = 17,642.04