Finding the Fourth Proportional to 78,855.89, 108,821.22 and 50,561.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,855.89 : 108,821.22 = 50,561.57 : x
2. Step 2: Convert to fraction form
   78,855.89/108,821.22 = 50,561.57/x
3. Step 3: Cross multiply
   78,855.89x = 108,821.22 × 50,561.57
4. Step 4: Simplify right side
   78,855.89x = 5,502,171,732.52
5. Step 5: Solve for x
   x = 5,502,171,732.52/78,855.89
6. Step 6: Final answer
   x = 69,775.03