Finding the Fourth Proportional to 22,211.31, 30,650.63 and 12,139.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,211.31 : 30,650.63 = 12,139.29 : x
2. Step 2: Convert to fraction form
   22,211.31/30,650.63 = 12,139.29/x
3. Step 3: Cross multiply
   22,211.31x = 30,650.63 × 12,139.29
4. Step 4: Simplify right side
   22,211.31x = 372,076,825.56
5. Step 5: Solve for x
   x = 372,076,825.56/22,211.31
6. Step 6: Final answer
   x = 16,751.68