Finding the Fourth Proportional to 33,638.61, 50,461.56 and 12,588.69

Step by Step Solution

1. Step 1: Write the proportion equation
   33,638.61 : 50,461.56 = 12,588.69 : x
2. Step 2: Convert to fraction form
   33,638.61/50,461.56 = 12,588.69/x
3. Step 3: Cross multiply
   33,638.61x = 50,461.56 × 12,588.69
4. Step 4: Simplify right side
   33,638.61x = 635,244,935.76
5. Step 5: Solve for x
   x = 635,244,935.76/33,638.61
6. Step 6: Final answer
   x = 18,884.40