Finding the Fourth Proportional to 810,269.84, 1,118,142.33 and 447,685.89

Step by Step Solution

1. Step 1: Write the proportion equation
   810,269.84 : 1,118,142.33 = 447,685.89 : x
2. Step 2: Convert to fraction form
   810,269.84/1,118,142.33 = 447,685.89/x
3. Step 3: Cross multiply
   810,269.84x = 1,118,142.33 × 447,685.89
4. Step 4: Simplify right side
   810,269.84x = 500,576,544,152.72
5. Step 5: Solve for x
   x = 500,576,544,152.72/810,269.84
6. Step 6: Final answer
   x = 617,789.93