Finding the Fourth Proportional to 33,640.42, 50,422.91 and 13,645.27

Step by Step Solution

1. Step 1: Write the proportion equation
   33,640.42 : 50,422.91 = 13,645.27 : x
2. Step 2: Convert to fraction form
   33,640.42/50,422.91 = 13,645.27/x
3. Step 3: Cross multiply
   33,640.42x = 50,422.91 × 13,645.27
4. Step 4: Simplify right side
   33,640.42x = 688,033,969.02
5. Step 5: Solve for x
   x = 688,033,969.02/33,640.42
6. Step 6: Final answer
   x = 20,452.60