Finding the Fourth Proportional to 22,211.61, 30,649.91 and 12,139.41

Step by Step Solution

1. Step 1: Write the proportion equation
   22,211.61 : 30,649.91 = 12,139.41 : x
2. Step 2: Convert to fraction form
   22,211.61/30,649.91 = 12,139.41/x
3. Step 3: Cross multiply
   22,211.61x = 30,649.91 × 12,139.41
4. Step 4: Simplify right side
   22,211.61x = 372,071,823.95
5. Step 5: Solve for x
   x = 372,071,823.95/22,211.61
6. Step 6: Final answer
   x = 16,751.23