Finding the Fourth Proportional to 519,667.92, 717,248.52 and 304,920.72

Step by Step Solution

1. Step 1: Write the proportion equation
   519,667.92 : 717,248.52 = 304,920.72 : x
2. Step 2: Convert to fraction form
   519,667.92/717,248.52 = 304,920.72/x
3. Step 3: Cross multiply
   519,667.92x = 717,248.52 × 304,920.72
4. Step 4: Simplify right side
   519,667.92x = 218,703,935,137.33
5. Step 5: Solve for x
   x = 218,703,935,137.33/519,667.92
6. Step 6: Final answer
   x = 420,853.25