Finding the Fourth Proportional to 78,449.40, 108,284.94 and 50,155.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,449.40 : 108,284.94 = 50,155.20 : x
2. Step 2: Convert to fraction form
   78,449.40/108,284.94 = 50,155.20/x
3. Step 3: Cross multiply
   78,449.40x = 108,284.94 × 50,155.20
4. Step 4: Simplify right side
   78,449.40x = 5,431,052,822.69
5. Step 5: Solve for x
   x = 5,431,052,822.69/78,449.40
6. Step 6: Final answer
   x = 69,230.01