Finding the Fourth Proportional to 1,222,456.72, 1,833,269.78 and 423,551.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,456.72 : 1,833,269.78 = 423,551.79 : x
2. Step 2: Convert to fraction form
   1,222,456.72/1,833,269.78 = 423,551.79/x
3. Step 3: Cross multiply
   1,222,456.72x = 1,833,269.78 × 423,551.79
4. Step 4: Simplify right side
   1,222,456.72x = 776,484,685,587.80
5. Step 5: Solve for x
   x = 776,484,685,587.80/1,222,456.72
6. Step 6: Final answer
   x = 635,183.78