Finding the Fourth Proportional to 22,222.84, 30,671.24 and 12,789.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,222.84 : 30,671.24 = 12,789.40 : x
2. Step 2: Convert to fraction form
   22,222.84/30,671.24 = 12,789.40/x
3. Step 3: Cross multiply
   22,222.84x = 30,671.24 × 12,789.40
4. Step 4: Simplify right side
   22,222.84x = 392,266,756.86
5. Step 5: Solve for x
   x = 392,266,756.86/22,222.84
6. Step 6: Final answer
   x = 17,651.51