Finding the Fourth Proportional to 22,263.37, 30,722.29 and 12,189.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,263.37 : 30,722.29 = 12,189.88 : x
2. Step 2: Convert to fraction form
   22,263.37/30,722.29 = 12,189.88/x
3. Step 3: Cross multiply
   22,263.37x = 30,722.29 × 12,189.88
4. Step 4: Simplify right side
   22,263.37x = 374,501,028.43
5. Step 5: Solve for x
   x = 374,501,028.43/22,263.37
6. Step 6: Final answer
   x = 16,821.40