Finding the Fourth Proportional to 78,856.08, 108,759.69 and 50,564.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,856.08 : 108,759.69 = 50,564.40 : x
2. Step 2: Convert to fraction form
   78,856.08/108,759.69 = 50,564.40/x
3. Step 3: Cross multiply
   78,856.08x = 108,759.69 × 50,564.40
4. Step 4: Simplify right side
   78,856.08x = 5,499,368,469.04
5. Step 5: Solve for x
   x = 5,499,368,469.04/78,856.08
6. Step 6: Final answer
   x = 69,739.31