Finding the Fourth Proportional to 53,839.69, 80,771.07 and 16,402.78

Step by Step Solution

1. Step 1: Write the proportion equation
   53,839.69 : 80,771.07 = 16,402.78 : x
2. Step 2: Convert to fraction form
   53,839.69/80,771.07 = 16,402.78/x
3. Step 3: Cross multiply
   53,839.69x = 80,771.07 × 16,402.78
4. Step 4: Simplify right side
   53,839.69x = 1,324,870,087.23
5. Step 5: Solve for x
   x = 1,324,870,087.23/53,839.69
6. Step 6: Final answer
   x = 24,607.68