Finding the Fourth Proportional to 78,640.56, 108,561.12 and 50,362.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,640.56 : 108,561.12 = 50,362.56 : x
2. Step 2: Convert to fraction form
   78,640.56/108,561.12 = 50,362.56/x
3. Step 3: Cross multiply
   78,640.56x = 108,561.12 × 50,362.56
4. Step 4: Simplify right side
   78,640.56x = 5,467,415,919.67
5. Step 5: Solve for x
   x = 5,467,415,919.67/78,640.56
6. Step 6: Final answer
   x = 69,524.12