Finding the Fourth Proportional to 663,974.40, 996,276.69 and 344,066.47

Step by Step Solution

1. Step 1: Write the proportion equation
   663,974.40 : 996,276.69 = 344,066.47 : x
2. Step 2: Convert to fraction form
   663,974.40/996,276.69 = 344,066.47/x
3. Step 3: Cross multiply
   663,974.40x = 996,276.69 × 344,066.47
4. Step 4: Simplify right side
   663,974.40x = 342,785,404,616.25
5. Step 5: Solve for x
   x = 342,785,404,616.25/663,974.40
6. Step 6: Final answer
   x = 516,262.99