Finding the Fourth Proportional to 839,275.89, 1,259,285.94 and 439,821.69

Step by Step Solution

1. Step 1: Write the proportion equation
   839,275.89 : 1,259,285.94 = 439,821.69 : x
2. Step 2: Convert to fraction form
   839,275.89/1,259,285.94 = 439,821.69/x
3. Step 3: Cross multiply
   839,275.89x = 1,259,285.94 × 439,821.69
4. Step 4: Simplify right side
   839,275.89x = 553,861,265,601.72
5. Step 5: Solve for x
   x = 553,861,265,601.72/839,275.89
6. Step 6: Final answer
   x = 659,927.53