Finding the Fourth Proportional to 33,643.50, 46,424.56 and 20,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   33,643.50 : 46,424.56 = 20,720.72 : x
2. Step 2: Convert to fraction form
   33,643.50/46,424.56 = 20,720.72/x
3. Step 3: Cross multiply
   33,643.50x = 46,424.56 × 20,720.72
4. Step 4: Simplify right side
   33,643.50x = 961,950,308.88
5. Step 5: Solve for x
   x = 961,950,308.88/33,643.50
6. Step 6: Final answer
   x = 28,592.46