Finding the Fourth Proportional to 80,907.39, 111,649.62 and 50,709

Step by Step Solution

1. Step 1: Write the proportion equation
   80,907.39 : 111,649.62 = 50,709 : x
2. Step 2: Convert to fraction form
   80,907.39/111,649.62 = 50,709/x
3. Step 3: Cross multiply
   80,907.39x = 111,649.62 × 50,709
4. Step 4: Simplify right side
   80,907.39x = 5,661,640,580.58
5. Step 5: Solve for x
   x = 5,661,640,580.58/80,907.39
6. Step 6: Final answer
   x = 69,976.80