Finding the Fourth Proportional to 33,688.61, 50,541.56 and 12,628.94

Step by Step Solution

1. Step 1: Write the proportion equation
   33,688.61 : 50,541.56 = 12,628.94 : x
2. Step 2: Convert to fraction form
   33,688.61/50,541.56 = 12,628.94/x
3. Step 3: Cross multiply
   33,688.61x = 50,541.56 × 12,628.94
4. Step 4: Simplify right side
   33,688.61x = 638,286,012.89
5. Step 5: Solve for x
   x = 638,286,012.89/33,688.61
6. Step 6: Final answer
   x = 18,946.64