Finding the Fourth Proportional to 43,229.98, 64,839.50 and 13,650.80

Step by Step Solution

1. Step 1: Write the proportion equation
   43,229.98 : 64,839.50 = 13,650.80 : x
2. Step 2: Convert to fraction form
   43,229.98/64,839.50 = 13,650.80/x
3. Step 3: Cross multiply
   43,229.98x = 64,839.50 × 13,650.80
4. Step 4: Simplify right side
   43,229.98x = 885,110,978.35
5. Step 5: Solve for x
   x = 885,110,978.35/43,229.98
6. Step 6: Final answer
   x = 20,474.47