Finding the Fourth Proportional to 22,210.81, 30,651.55 and 12,139.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,210.81 : 30,651.55 = 12,139.67 : x
2. Step 2: Convert to fraction form
   22,210.81/30,651.55 = 12,139.67/x
3. Step 3: Cross multiply
   22,210.81x = 30,651.55 × 12,139.67
4. Step 4: Simplify right side
   22,210.81x = 372,099,748.27
5. Step 5: Solve for x
   x = 372,099,748.27/22,210.81
6. Step 6: Final answer
   x = 16,753.09