Finding the Fourth Proportional to 819,624.69, 1,131,162.71 and 497,309.49

Step by Step Solution

1. Step 1: Write the proportion equation
   819,624.69 : 1,131,162.71 = 497,309.49 : x
2. Step 2: Convert to fraction form
   819,624.69/1,131,162.71 = 497,309.49/x
3. Step 3: Cross multiply
   819,624.69x = 1,131,162.71 × 497,309.49
4. Step 4: Simplify right side
   819,624.69x = 562,537,947,930.57
5. Step 5: Solve for x
   x = 562,537,947,930.57/819,624.69
6. Step 6: Final answer
   x = 686,336.02