Finding the Fourth Proportional to 22,200.52, 30,636.20 and 12,129

Step by Step Solution

1. Step 1: Write the proportion equation
   22,200.52 : 30,636.20 = 12,129 : x
2. Step 2: Convert to fraction form
   22,200.52/30,636.20 = 12,129/x
3. Step 3: Cross multiply
   22,200.52x = 30,636.20 × 12,129
4. Step 4: Simplify right side
   22,200.52x = 371,586,469.80
5. Step 5: Solve for x
   x = 371,586,469.80/22,200.52
6. Step 6: Final answer
   x = 16,737.74