Finding the Fourth Proportional to 80,582.95, 111,205.13 and 50,385.78

Step by Step Solution

1. Step 1: Write the proportion equation
   80,582.95 : 111,205.13 = 50,385.78 : x
2. Step 2: Convert to fraction form
   80,582.95/111,205.13 = 50,385.78/x
3. Step 3: Cross multiply
   80,582.95x = 111,205.13 × 50,385.78
4. Step 4: Simplify right side
   80,582.95x = 5,603,156,829.52
5. Step 5: Solve for x
   x = 5,603,156,829.52/80,582.95
6. Step 6: Final answer
   x = 69,532.78