Finding the Fourth Proportional to 78,797.50, 108,740.55 and 50,503.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,797.50 : 108,740.55 = 50,503.20 : x
2. Step 2: Convert to fraction form
   78,797.50/108,740.55 = 50,503.20/x
3. Step 3: Cross multiply
   78,797.50x = 108,740.55 × 50,503.20
4. Step 4: Simplify right side
   78,797.50x = 5,491,745,744.76
5. Step 5: Solve for x
   x = 5,491,745,744.76/78,797.50
6. Step 6: Final answer
   x = 69,694.42