Finding the Fourth Proportional to 22,189.60, 30,621.81 and 12,118.06

Step by Step Solution

1. Step 1: Write the proportion equation
   22,189.60 : 30,621.81 = 12,118.06 : x
2. Step 2: Convert to fraction form
   22,189.60/30,621.81 = 12,118.06/x
3. Step 3: Cross multiply
   22,189.60x = 30,621.81 × 12,118.06
4. Step 4: Simplify right side
   22,189.60x = 371,076,930.89
5. Step 5: Solve for x
   x = 371,076,930.89/22,189.60
6. Step 6: Final answer
   x = 16,723.01