Finding the Fourth Proportional to 50,640.80, 69,884.24 and 28,284.80

Step by Step Solution

1. Step 1: Write the proportion equation
   50,640.80 : 69,884.24 = 28,284.80 : x
2. Step 2: Convert to fraction form
   50,640.80/69,884.24 = 28,284.80/x
3. Step 3: Cross multiply
   50,640.80x = 69,884.24 × 28,284.80
4. Step 4: Simplify right side
   50,640.80x = 1,976,661,751.55
5. Step 5: Solve for x
   x = 1,976,661,751.55/50,640.80
6. Step 6: Final answer
   x = 39,032.99