Finding the Fourth Proportional to 33,185.18, 49,778.28 and 12,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   33,185.18 : 49,778.28 = 12,129.50 : x
2. Step 2: Convert to fraction form
   33,185.18/49,778.28 = 12,129.50/x
3. Step 3: Cross multiply
   33,185.18x = 49,778.28 × 12,129.50
4. Step 4: Simplify right side
   33,185.18x = 603,785,771.71
5. Step 5: Solve for x
   x = 603,785,771.71/33,185.18
6. Step 6: Final answer
   x = 18,194.44