Finding the Fourth Proportional to 22,220.88, 30,667.52 and 12,789.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,220.88 : 30,667.52 = 12,789.24 : x
2. Step 2: Convert to fraction form
   22,220.88/30,667.52 = 12,789.24/x
3. Step 3: Cross multiply
   22,220.88x = 30,667.52 × 12,789.24
4. Step 4: Simplify right side
   22,220.88x = 392,214,273.48
5. Step 5: Solve for x
   x = 392,214,273.48/22,220.88
6. Step 6: Final answer
   x = 17,650.71