Finding the Fourth Proportional to 78,854.89, 108,819.84 and 50,560.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,854.89 : 108,819.84 = 50,560.57 : x
2. Step 2: Convert to fraction form
   78,854.89/108,819.84 = 50,560.57/x
3. Step 3: Cross multiply
   78,854.89x = 108,819.84 × 50,560.57
4. Step 4: Simplify right side
   78,854.89x = 5,501,993,137.71
5. Step 5: Solve for x
   x = 5,501,993,137.71/78,854.89
6. Step 6: Final answer
   x = 69,773.65