Finding the Fourth Proportional to 22,189.38, 30,621.10 and 12,117.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,189.38 : 30,621.10 = 12,117.79 : x
2. Step 2: Convert to fraction form
   22,189.38/30,621.10 = 12,117.79/x
3. Step 3: Cross multiply
   22,189.38x = 30,621.10 × 12,117.79
4. Step 4: Simplify right side
   22,189.38x = 371,060,059.37
5. Step 5: Solve for x
   x = 371,060,059.37/22,189.38
6. Step 6: Final answer
   x = 16,722.42