Finding the Fourth Proportional to 33,642.05, 50,425.34 and 13,646.89

Step by Step Solution

1. Step 1: Write the proportion equation
   33,642.05 : 50,425.34 = 13,646.89 : x
2. Step 2: Convert to fraction form
   33,642.05/50,425.34 = 13,646.89/x
3. Step 3: Cross multiply
   33,642.05x = 50,425.34 × 13,646.89
4. Step 4: Simplify right side
   33,642.05x = 688,148,976.25
5. Step 5: Solve for x
   x = 688,148,976.25/33,642.05
6. Step 6: Final answer
   x = 20,455.03